1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C...
Transcript of 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C...
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1973-80 CHEVROLET PICKUP with FACTORY AIR
754175
904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27
an ISO 9001:2008 Registered Company
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2904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 2 OF 27
PAGES
Table of Contents
1. COVER 2. TABLE OF CONTENTS 3. PACKING LIST/PARTS DISCLAIMER 4. INFORMATION PAGE 5. WIRING NOTICE 6. ENGINE COMPARTMENT, CONDENSER ASSEMBLY, COMPRESSOR & BRACKET FIGURE 1 7. PASSENGER COMPARTMENT FIGURES 2, 2a, 2b & 2c 8. DEFROST DUCT INSTALLATION & FRESH AIR CAP INSTALLATION AND FIREWALL MODIFICATION FIGURES 3 & 4 9. FIREWALL MODIFICATION CONT. & FIREWALL COVER INSTALLATION FIGURES 5 & 610. BRACKET & EVAPORATOR HARDLINE INSTALLATION FIGURE 711. BRACKET & EVAPORATOR HARDLINE INSTALLATION CONT. FIGURE 812. EVAPORATOR INSTALLATION FIGURES 9 & 9a 9b13. DRAIN HOSE INSTALLATION, LUBRICATING O-RINGS, A/C HOSE INSTALLATION & MODIFIED A/C HOSE KIT FIGURES 10 & 1114. HEATER HOSE & HEATER CONTROL VALVE INSTALLATION FIGURE 1215. A/C & HEATER HOSE ROUTING FIGURE 1316. DRIVER AND PASSENGER SIDE CENTER LOUVER HOSE ADAPTER INSTALLATION & DRIVER AND PASSENGER SIDE LOUVER HOSE ADAPTER INSTALLATION FIGURES 14, 14a, 15 & 15a17. FINAL STEPS FIGURE 1618. GLOVE BOX MODIFICATION FIGURES 17 & 17a19. CONTROL PANEL & DUCT HOSE ROUTING FIGURE 1820. WIRING DIAGRAM21. GEN IV WIRING CONNECTION INSTRUCTIONS22. OPERATION OF CONTROLS23. TROUBLESHOOTING INFORMATION24. TROUBLESHOOTING INFORMATION CONT.25. GLOVE BOX MODIFICATION TEMPLATE26. POWER STEERING BRACKET MODIFICATION27. EVAPORATOR KIT PACKING LIST
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3904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 3 OF 27
** BEFORE BEGINNING INSTALLATION, OPEN ALL PACKAGES AND CHECK CONTENTS OF SHIPMENT. PLEASE REPORT ANY SHORTAGES DIRECTLY TO VINTAGE AIR WITHIN 15 DAYS. AFTER 15 DAYS, VINTAGE AIR WILL NOT BE RESPONSIBLE FOR MISSING OR DAMAGED ITEMS.
EVAPORATOR KIT754175
1.2.
11
744004-VUE794175
1
ACCESSORY KIT794175
2
GEN IV 4-VENTEVAPORATOR SUB CASE
with 204 ECU744004-VUE
GEN IV 4-VENT EVAPORATOR SUB CASE with 204 ECU ACCESSORY KIT 1973-80 CHEVROLET PICKUP with A/C
No. QTY. PART No. DESCRIPTION
EVAPORATOR KIT PACKING LIST
NOTE: IMAGES MAY NOT DEPICT ACTUAL PARTS AND QUANTITIES.REFER TO PACKING LIST FOR ACTUAL PARTS AND QUANTITIES.
OFF
DASH
HOT
FLR
A/C
HI
DEF
COLD
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4904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 4 OF 27
Important Notice—Please ReadFor Maximum System Performance, Vintage Air Recommends the Following:
New Vintage Air-supplied Sanden Compressor: No additional oil needed (Compressor is shipped with proper oil charge).All Other Compressors: Consult manufacturer (Some compressors are shipped dry and will need oil added).
NOTE: Vintage Air systems are designed to operate with R134a refrigerant only. Use of any other refrigerant could damage your A/C system and/or vehicle, and possibly cause a fire, in addition to potentially voiding the warranties of the A/C system and its components.
Refrigerant Capacities:Vintage Air System: 1.8 lbs. (1 lb., 12 oz.) of R134a, charged by weight with a quality charging station or scale. NOTE: Use of the proper type and amount of refrigerant is critical to system operation and performance.Other Systems: Consult manufacturer’s guidelines.
Lubricant Capacities:
Safety Switches
Service Info:Protect Your Investment: Prior to assembly, it is critical that the compressor, evaporator, A/C hoses and fittings, hardlines, condenser and receiver/drier remained capped. Removing caps prior to assembly will allow moisture, insects and debris into the components, possibly leading to reduced performance and/or premature failure of your A/C system. This is especially important with the receiver/drier. Additionally, when caps are removed for assembly, BE CAREFUL! Some components are shipped under pressure with dry nitrogen.Evacuate the System for 35-45 Minutes: Ensure that system components (Drier, compressor, evaporator and condenser) are at a temperature of at least 85° F. On a cool day, the components can be heated with a heat gun or by running the engine with the heater on before evacuating. Leak check and charge to specifications.
Your Vintage Air system is equipped with a binary pressure safety switch. A binary switch disengages the compressor clutch in cases of extreme low pressure conditions (Refrigerant Loss) or excessively high head pressure (406 PSI) to prevent compressor damage or hose rupture. A trinary switch combines Hi/Lo pressure protection with an electric fan operation signal at 254 PSI, and should be substituted for use with electric fans. Compressor safety switches are extremely important since an A/C system relies on refrigerant to circulate lubricant.
Bolts Passing Through Cowl and/or Firewall:To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts passing through the cowl and/or firewall, Vintage Air recommends coating the threads with silicone prior to installation.
Heater Hose (Not Included With This Kit):Heater hose may be purchased from Vintage Air (Part# 31800-VUD) or your local parts retailer. Routing and required length will vary based on installer preference.
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5904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 5 OF 27
Important Wiring Notice—Please Read
Some Vehicles May Have Had Some or All of Their Radio Interference Capacitors Removed. There Should Be a Capacitor Found At Each of the Following Locations:
1. On the positive terminal of the ignition coil.2. If there is a generator, on the armature terminal of the generator.3. If there is a generator, on the battery terminal of the voltage regulator.
Most alternators have a capacitor installed internally to eliminate what is called “whining” as the engine is revved. If whining is heard in the radio, or just to be extra cautious, a radio interference capacitor can be added to the battery terminal of the alternator.
It is also important that the battery lead is in good shape and that the ground leads are not compromised. There should be a heavy ground from the battery to the engine block, and additional grounds to the body and chassis.
If these precautions are not observed, it is possible for voltage spikes to be present on the battery leads. These spikes come from ignition systems, charging systems, and from switching some of the vehicle’s other systems on and off. Modern computer-operated equipment can be sensitive to voltage spikes on the power leads, which can cause unexpected resets, strange behavior, and/or permanent damage.
Vintage Air strives to harden our products against these types of electrical noise, but there is a point where a vehicle’s electrical system can be degraded so much that nothing can help.
Radio interference capacitors should be available at most auto and truck parts suppliers. They typically are cylindrical in shape, a little over an inch long, a little over a half inch in diameter, and they have a single lead coming from one end of the cylinder with a terminal on the end of the wire, as well as a mounting clip which is screwed into a good ground on the vehicle. The specific value of the capacitance is not too significant in comparison to ignition capacitors that are matched with the coil to reduce pitting of the points.
Care must be taken, when installing the compressor lead, not to short it to ground. The compressor lead must not be connected to a condenser fan or to any other auxiliary device. Shorting to ground or connecting to a condenser fan or any other auxiliary device may damage wiring, the compressor relay, and/or cause a malfunction.
When installing ground leads on Gen IV systems, the blower control ground and ECU ground must be connected directly to the negative battery post.
For proper system operation, the heater control valve must be connected to the ECU.
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6904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 6 OF 27
DISCONNECT BATTERY.DRAIN RADIATOR, REMOVE RADIATOR (RETAIN). EVACUATE THE A/C SYSTEM IF NECESSARY. OEM CONDENSER AND DRIER (DISCARD). SEE FIGURE 1. OEM A/C LINES FROM COMPRESSOR TO EVAPORATOR (DISCARD).OEM COMPRESSOR AND BRACKET (DISCARD). EVAPORATOR BLOWER ASSEMBLY (DISCARD).NOTE: TO REMOVE THE EVAPORATOR AND BLOWER ASSEMBLY (UNDER HOOD) AND THE AIR DISTRIBUTION SYSTEM (UNDER DASH), THE FACTORY MANUAL RECOMMENDS THAT YOU REMOVE RIGHT INNER FENDER FOR ACCESSIBILITY. OEM HEATER HOSES, A/C HOSES AND HARDLINES (DISCARD). SEE FIGURE 1.
ENGINE COMPARTMENTREMOVE THE FOLLOWING:
FIGURE 1
EVAPORATORBLOWER
HOUSING
COMPRESSOR
DRIER &CONDENSER
BEFORE STARTING THE INSTALLATION, CHECK THE FUNCTIONOF THE VEHICLE (HORN, LIGHTS,ETC.) FOR PROPER OPERATIONS.
STUDY THE INSTRUCTIONS, ILLUSTRATIONS & DIAGRAMS.
CONDENSER ASSEMBLY & INSTALLATIONREFER TO SEPARATE INSTRUCTIONS INCLUDED WITH THE CONDENSER KIT TO INSTALL THE CONDENSER.BINARY SWITCH INSTALLATION (REFER TO CONDENSER INSTRUCTIONS).
REFER TO SEPARATE INSTRUCTIONS INCLUDED WITH THE BRACKET KIT TO INSTALL THE COMPRESSOR AND BRACKET.
COMPRESSOR & BRACKETS
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7904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 7 OF 27
GLOVE BOX DOOR AND GLOVE BOX ASSEMBLY (RETAIN) (SEE FIGURE 2, BELOW).UNDER DASH STEERING COLUMN COVER (RETAIN) (SEE FIGURE 2).INSTRUMENT PANEL BEZEL (RETAIN).DASH PAD (RETAIN) (SEE FIGURE 2).DISCONNECT ALL WIRES AND CABLES FROM CONTROL PANEL. REMOVE CONTROL PANEL (DISCARD). REFER TO CONTROL PANEL CONVERSION KIT INSTRUCTIONS.ASH TRAY (RETAIN).ALL HOSE AND DUCTING FROM OEM LOUVERS (SEE FIGURE 2a BELOW).A/C & HEATER ASSEMBLY (DISCARD) (SEE FIGURE 2a).DEFROST DUCT ASSEMBLY (DISCARD) (SEE FIGURE 2a, BELOW).PASSENGER SIDE KICK PANEL ASSEMBLY (RETAIN KICK PANEL COVER & KICK PANEL CAP, BUT DISCARD DOOR & ACTUATOR). SEE FIGURE 2b.APPLY 1/4” BEAD OF SILICONE ON BACK SIDE OF KICK PANEL BLOCK OFF PLATE.INSTALL KICK PANEL BLOCK OFF PLATE USING (2) #8 x 1/2” PH PAN HEADSCREWS (SEE FIGURE 2c).NOTE: FOR EASE OF INSTALLING EVAPORATOR UNDER DASH, IT MAY BE HELPFUL TO REMOVE THE (2) OEM BOLTS UNDER THE DASH ON THE PASSENGER SIDE DOOR PILLAR AND PULL BACK DASH.NOTE: SOME MODELS MAY BE EQUIPPED WITH DASH BRACE (REMOVEAND RETAIN) (SEE FIGURE 2a).
PASSENGER COMPARTMENTREMOVE THE FOLLOWING:
FRESH AIRDOOR ASSEMBLY
KICK PANELCOVER
KICK PANELCOVER
(2) #8 x 1/2”PH PAN HEAD
SCREWS
KICK PANELBLOCK OFF
PLATE62438-LCE
KICKPANELCAP
FIGURE 2
FIGURE 2a
FIGURE 2b
FIGURE 2c
CONTROL PANEL
INSTRUMENTPANELBEZEL DEFROST DUCT
ASSEMBLY
A/C & HEATERASSEMBLY
(2) OEMBOLTS
DASH BRACE
ALL HOSE AND RELATED
DUCTINGFROM LOUVERS
UNDER DASH COVER
GLOVE BOXDOOR &
GLOVE BOX
DASH PAD
ASH TRAY SILICONE
BACK SIDE
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8904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 8 OF 27
DEFROST DUCT INSTALLATIONINSTALL DRIVER AND PASSENGER SIDE DEFROST DUCTS AS SHOWN BELOW.
(2) DEFROSTDUCTS623224
DEFROST DUCTOEM OPENING
FIGURE 3
FIGURE 4
APPLY A 1/4” BEAD OF SILICONE AROUND THE BACK SIDE OF THE FRESH AIR CAP AS SHOWN IN FIGURE 4, BELOW.ATTACH FRESH AIR CAP TO FIREWALL USING A 1/4-20 x 1” BOLT AND WASHER. SEE FIGURE 4, BELOW.PLACE FIREWALL COVER ON FIREWALL AND SECURE USING (2) #14 x 3/4“ SHEET METAL SCREWS AS SHOWN BELOW.USING FIREWALL COVER AS TEMPLATE, MARK THE HOLES ON THE FIREWALL AS SHOWN BELOW.REMOVE FIREWALL COVER.
FRESH AIR CAP AND FIREWALL MODIFICATION
SILICONE
BACK SIDE OF FRESH AIR CAP
1/4-20 x 1”BOLT
1/4” FLATWASHER
FRESH AIR CAP
MARKHOLES
MARKHOLE
MARKHOLE
MARK HOLE
MARKHOLES
MARK HOLES
#14 x 3/4”SHEET METAL
SCREW
OEM HOLES
OEM HOLE
OEM HOLE
#14 x 3/4”SHEET METAL
SCREW
THINNER SIDE OF FLANGEGOES TOWARD WINDSHIELD
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9904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 9 OF 27
FIGURE 5
DRILL HOLES AS SHOWN BELOW IN FIGURE 5.
FIREWALL MODIFICATION CONT.
FIGURE 6
APPLY A 1/4” BEAD OF SILICONE AROUND THE BACK SIDE OF THE FIREWALL COVER AS SHOWN BELOW.INSTALL FIREWALL COVER TO FIREWALL USING A 1/4-20 x 3/4” HEX BOLT, 1/4“ FLAT WASHER, 1/4” NUT w/ STAR WASHER AND (8) #14 x 3/4“ SHEET METAL SCREWS AS SHOWN BELOW.INSTALL GROMMETS AS SHOWN BELOW.
FIREWALL COVER INSTALLATION
LARGE GROMMET33137-VUI
GROMMET33135-VUI
(8) #14 x 3/4”SHEET METAL
SCREWS
1/4-20 x 3/4”BOLT 1/4” FLAT
WASHER
1/4” NUT w/ STAR WASHER
BACK SIDE OF FIREWALL COVER
644086
SILICONE
GROMMET33144-VUI
DRILL 3/16” HOLE
DRILL 3/16” HOLE
(2) DRILL 2” HOLES
DRILL 3/16” HOLE
OEM HOLE
OEM HOLE
(3) DRILL 1 ⅛” HOLES
OEM HEATER HOLES
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10904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 10 OF 27
BRACKET & EVAPORATOR HARDLINE INSTALLATIONON A WORKBENCH, INSTALL EVAPORATOR REAR BRACKET USING (4) 1/4-20 x 1/2” HEX BOLTS (SEE FIGURE 8, PAGE 11).INSTALL #6 EVAPORATOR HARDLINE AND (2) HEATER HARDLINES WITH PROPERLY LUBRICATED O-RINGS(SEE FIGURE 8, PAGE 11, AND FIGURE 11, PAGE 13). INSTALL EVAPORATOR FRONT BRACKET ON EVAPORATOR USING (2) 1/4-20 x 1/2” HEX BOLTS, AND TIGHTEN AS SHOWN IN FIGURE 7, BELOW.
FIGURE 7
EVAPORATORFRONT
BRACKET644087
(2) 1/4-20 x 1/2”HEX BOLTS
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11904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 11 OF 27
BRACKET & EVAPORATOR HARDLINE INSTALLATION CONT.
FIGURE 8
#6 LIQUID LINE091153
TWIST WITHTHIS
WRENCHLUBRICATE O-RING
(SEE FIGURE 11,PAGE 13.)
HOLD WITH THIS WRENCH
HEATER LINE(EVAPORATOR TO WATER PUMP)
091151
ECU MODULE
#10 O-RING(33859-VUF)
(2) 1/4-20 x 1/2”HEX BOLTS
(2) 1/4-20 x 1/2”HEX BOLTS
REAREVAPORATOR
BRACKET644083
HEATER LINE(EVAPORATOR TO INTAKE)
091151
#6 O-RING(33857-VUF)
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12904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 12 OF 27
INNER COWL
DRILL (2)3/16” HOLES (2) #14 x 3/4”
SHEET METALSCREWS
(2) 1/4-20 x 1 ¼”HEX BOLTS
(2) 1/4” FLAT WASHERS
(2) .563 LSPACERS
VIEW FROMPASSENGER SIDEINSIDE OF CAB
FIGURE 9
FIGURE 9b
FIGURE 9a
EVAPORATOR INSTALLATION
LIFT EVAPORATOR UNIT UP UNDER THE DASHBOARD. SECURE LOOSELY TO THE FIREWALL USING (2) 1/4-20 x 1 ¼” HEX BOLTS, (2) FLAT WASHERS AND (2) .563 L SPACERS (SEE FIGURE 9).NOTE: TO ENSURE PROPER DRAINAGE, IT IS VERY IMPORTANT THAT THE EVAPORATOR IS LEVEL,BOTH LEFT-RIGHT AND FORE-AFT. CHECK FOR LEVEL ON THE FLAT PORTIONS OF THE CASE AROUNDTHE DRAIN, BLOCK THE UNIT UP, THEN DRILL FOR FRONT BRACKET SCREWS.SECURE THE FRONT EVAPORATOR MOUNTING BRACKET TO COWL USING (2) #14 x 3/4” HEX SHEET METAL SCREWS. SEE FIGURE 9a, BELOW.VERIFY THAT EVAPORATOR UNIT IS LEVEL AND SQUARE TO THE DASH. THEN TIGHTEN ALL MOUNTING BOLTS. NOTE: TIGHTEN THE BOLT ON FIREWALL FIRST, THEN THE FRONT MOUNTING BRACKET.INSTALL #10 SUCTION LINE AS SHOWN IN FIGURE 9b, BELOW.NOTE: WRAP THE #10 FITTING CONNECTIONS WITH PRESS TAPE. SEE FIGURE 9b, BELOW.REINSTALL (2) OEM BOLTS UNDER DASH ON PASSENGER SIDE DOOR PILLAR.REINSTALL DASH BRACE (IF EQUIPPED).
NOTE: AFTER INSTALLING #10 SUCTION LINE, WRAP ALL EXPOSED METAL (FITTINGS & TUBE) WITH SUPPLIED PRESS TAPE.
PRESS TAPE
#10 O-RING33859-VUF
#10 SUCTIONLINE
091152
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13904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 13 OF 27
LOCATE EVAPORATOR DRAIN ON BOTTOM OF EVAPORATOR CASE.IN LINE WITH DRAIN, LIGHTLY MAKE A MARKON THE FIREWALL. MEASURE 1” DOWN ANDDRILL A 5/8” HOLE THROUGH THE FIREWALL. INSTALL DRAIN HOSE TO BOTTOM OFEVAPORATOR UNIT AND ROUTE THROUGHFIREWALL. INSTALL 1/2” 90° DRAIN ELBOW ON DRAIN HOSE.
DRAIN HOSE INSTALLATION
FIGURE 10
EVAPORATORCASE1”
LOCATE THE #8 COMPRESSOR A/C HOSE. LUBRICATE (2) #8 O-RINGS (SEE FIGURE 11, ABOVE) ANDCONNECT THE 90° FEMALE FITTING TO THE #8 DISCHARGE PORT ON THE COMPRESSOR. ROUTE THESTRAIGHT FEMALE FITTING w/ 134a SERVICE PORT TO THE #8 CONDENSER HARDLINE COMING THROUGHCORE SUPPORT. SEE FIGURE 13, PAGE 15. TIGHTEN EACH FITTING CONNECTION AS SHOWN.
LOCATE THE #10 COMPRESSOR A/C HOSE. LUBRICATE (2) #10 O-RINGS (SEE FIGURE 11, ABOVE) AND CONNECT THE #10 135° FEMALE FITTING w/134a SERVICE PORT TO THE #10 SUCTION PORT ON THE COMPRESSOR. ROUTE THE STRAIGHT FEMALE FITTING TO THE #10 EVAPORATOR. SEE FIGURE 12, PAGE 14, AND FIGURE 13, PAGE 15. TIGHTEN EACH FITTING CONNECTION AS SHOWN.
INSTALL #6 A/C LIQUID LINE AS SHOWN IN FIGURE 13, PAGE 15.
A/C HOSE INSTALLATIONSTANDARD HOSE KIT
LUBRICATING O-RINGS
REFER TO SEPARATE INSTRUCTIONS INCLUDED WITH MODIFIED HOSE KIT. MODIFIED A/C HOSE KIT
DRAINHOSE
O-RING
#6 O-RING
#8 O-RING #10 O-RING
MALEINSERT
FEMALENUT
SUPPLIED OILFOR O-RINGS O-RINGS, INSTALLS
OVER MALE INSERTTO SWAGED LIP
1”
FIGURE 11
O-RING
FOR A PROPER SEAL OF FITTINGS:INSTALL SUPPLIED O-RINGS AS SHOWNAND LUBRICATE WITH SUPPLIED OIL.
TWIST WITHTHIS WRENCH
HOLD WITHTHIS WRENCH
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14904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 14 OF 27
ROUTE HEATER HOSE FROM WATER PUMP TO THE HEATER LINE COMING THROUGH THE FIREWALL AS SHOWN IN FIGURE 12, BELOW. SECURE USING HOSE CLAMPS. NOTE: A SMALL AMOUNT OF SILICONESPRAY WILL EASE HEATER HOSE INSTALLATION.
ROUTE HEATER HOSE FROM THE INTAKE TO THE HEATER LINE COMING THROUGH THE FIREWALL AS SHOWN BELOW. NOTE: INSTALL HEATER CONTROL VALVE IN LINE WITH INTAKE MANIFOLD (PRESSURE SIDE)HEATER HOSE. SECURE USING HOSE CLAMPS AS SHOWN. NOTE PROPER FLOW DIRECTION.
HOSE SHOULD PROTRUDE THROUGH THE FIREWALL COVER SLIGHTLY TO CLOSE THE GAP BETWEEN THE ALUMINUM LINE AND THE FIREWALL COVER. SEAL ANY REMAINING GAP WITH RTV SILICONE.
FIGURE 12
O-RINGS
HEATERHOSE
HEATERHOSE
NOTE: FLOW DIRECTION FOLLOWSMOLDED ARROW ON VALVE.
HEATER HOSE & HEATER CONTROL VALVE INSTALLATION
#6 LIQUIDLINE
FROM HEATER CORETO WATER PUMP
#10 SUCTIONLINE
FROM HTR CNTRL VLVTO HEATER CORE
FROM INTAKEMANIFOLD
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15904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 15 OF 27
FIG
UR
E 13
HEA
TER
HO
SE
#
2 A
DEL
CLA
MP
31600-V
UD
#10 A
DEL
CLA
MP
31601-V
UD
NO
TE:
VIN
TAG
E A
IR S
YSTE
MS
REQ
UIR
E(2
) 5/8
” H
OSE
NIP
PLE
S (N
OT
SUP
PLI
ED).
A/C
& H
EATE
R H
OSE
RO
UTI
NG
HEA
TER
HO
SE(H
EATE
R C
ON
TRO
LVA
LVE/
INTA
KE)
#8 D
ISC
HA
RGE
HO
SE096004
#10 S
UC
TIO
NH
OSE
096005
TIE
WRA
PFR
OM
HEA
TER
CO
NTR
OL
VA
LVE
TO H
EATE
R C
ORE
NO
TE:
FLO
W D
IREC
TIO
N F
OLL
OW
SM
OLD
ED A
RR
OW
ON
VA
LVE.
#6 C
ORE
/EV
APO
RATO
RLI
QU
IDH
ARD
LIN
E091147
#6 L
IQU
IDH
ARD
LIN
E091150
OU
T
#6 C
ON
DEN
SER/
DRI
ERH
ARD
LIN
E091145
CO
MPR
ESSO
RSA
FETY
SW
ITC
H(B
INA
RY T
YPE)
SCRE
W-O
N D
RIER
(REF
ER T
OC
ON
DEN
SER
INST
RUC
TIO
NS)
#6 D
RIER
/ C
ORE
SU
PPO
RTH
ARD
LIN
E091146
IN
#8 C
ON
DEN
SER
HA
RDLI
NE
091148
FRO
M IN
TAKE
MA
NIF
OLD
![Page 16: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/16.jpg)
16904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 16 OF 27
DRIVER AND PASSENGER SIDECENTER LOUVER HOSE ADAPTER INSTALLATION
INSTALL (4) S-CLIPS ON DRIVER SIDE CENTER LOUVER HOSE ADAPTER (SEE FIGURE 14, BELOW).INSTALL DRIVER SIDE CENTER LOUVER HOSE ADAPTER IN CENTER LOUVER AS SHOWN BELOW IN FIGURE 14.INSTALL (4) S-CLIPS ON PASSENGER SIDE CENTER LOUVER HOSE ADAPTER (SEE FIGURE 14a, BELOW).INSTALL PASSENGER SIDE CENTER LOUVER HOSE ADAPTER IN OEM PASSENGER SIDE CENTER LOUVERAS SHOWN BELOW IN FIGURE 14a.
DRIVER AND PASSENGER SIDE LOUVER HOSE ADAPTER INSTALLATIONINSTALL (3) S-CLIPS ON PASSENGER SIDE LOUVER HOSE ADAPTER (SEE FIGURE 15).INSTALL PASSENGER SIDE LOUVER HOSE ADAPTER TO PASSENGER SIDE LOUVER AS SHOWN BELOWIN FIGURE 15.CUT & REMOVE DRIVER SIDE LOUVER DUCT AS SHOWN IN FIGURE 15a.INSTALL (4) S-CLIPS ON DRIVER SIDE LOUVER HOSE ADAPTER AS SHOWN IN FIGURE 15a.INSTALL DRIVER SIDE LOUVER HOSE ADAPTER INDRIVER SIDE LOUVER DUCT AS SHOWN BELOW.
PASSENGER SIDELOUVER HOSE
ADAPTER623220
(3) S-CLIPS
1/2”
DRIVER SIDE LOUVER DUCT
CUT &REMOVE
DASH PADINSTRUMENT
PANEL BEZELDRIVER SIDE
CENTER LOUVERHOSE ADAPTER
623216 PASSENGER SIDECENTER LOUVER HOSE ADAPTER
623221
OEM PASSENGER SIDE CENTER LOUVER
(4) S-CLIPS
(4) S-CLIPS
FIGURE 14 FIGURE 14a
FIGURE 15
FIGURE 15a
DRIVER SIDE LOUVER DUCT
DRIVER SIDE LOUVER HOSE
ADAPTER623215
(4) S-CLIPS
![Page 17: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/17.jpg)
17904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 17 OF 27
INSTALL DUCT HOSES AS SHOWN IN FIGURE 18, PAGE 19.ROUTE A/C WIRES THROUGH 3/8” GROMMET AS SHOWN IN FIGURE 16(12 VOLT/GROUND/BINARY SWITCH/HEATER VALVE).INSTALL CONTROL PANEL ASSEMBLY.PLUG THE WIRING HARNESS IN THE ECU MODULE ON SUB CASE AS SHOWN IN FIGURE 18, PAGE 19(WIRE ACCORDING TO WIRING DIAGRAM ON PAGE 20 AND 21).MODIFY GLOVE BOX AS SHOWN ON PAGE 18.REINSTALL GLOVE BOX.REINSTALL ALL PREVIOUSLY REMOVED ITEMS, INNER FENDER.FILL RADIATOR WITH AT LEAST A 50/50 MIXTURE OF APPROVED ANTIFREEZE AND DISTILLED WATER. IT IS THEOWNER'S RESPONSIBILITY TO KEEP THE FREEZE PROTECTION AT THE PROPER LEVEL FOR THE CLIMATE INWHICH THE VEHICLE IS OPERATED. FAILURE TO FOLLOW ANTIFREEZE RECOMMENDATIONS WILL CAUSEHEATER CORE TO CORRODE PREMATURELY AND POSSIBLY BURST IN A/C MODE AND/OR FREEZING WEATHER,VOIDING YOUR WARRANTY.DOUBLE CHECK ALL FITTINGS, BRACKETS AND BELTS FOR TIGHTNESS.VINTAGE AIR RECOMMENDS THAT ALL A/C SYSTEMS BE SERVICED BY A CERTIFIED AUTOMOTIVE AIRCONDITIONING TECHNICIAN. EVACUATE THE SYSTEM FOR A MINIMUM OF 45 MINUTES PRIOR TO CHARGING, AND LEAK CHECK PRIORTO SERVICING. CHARGE THE SYSTEM TO THE CAPACITIES STATED ON THE INFORMATION PAGE (PAGE 4) OF THISINSTRUCTION MANUAL. SEE OPERATION OF CONTROLS PROCEDURES PAGE 22.
FINAL STEPS
FIGURE 16
3/8” GROMMET33144-VUI
WIRING HARNESS(HEATER CONTROL VALVE)
WIRING HARNESS(12 VOLT/GROUNDS/BINARY SWITCH)
![Page 18: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/18.jpg)
18904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 18 OF 27
GLOVE BOX MODIFICATION USE GLOVE BOX MODIFICATION TEMPLATE PROVIDED ON PAGE 25.PLACE THE TEMPLATE ON THE OUTSIDE OF THE GLOVE BOX ON THE PASSENGER SIDE. MARK THE OUTSIDE OF THE GLOVE BOX ALONG THE FRONT OF THE TEMPLATE AS SHOWN IN FIGURE 17, BELOW.PLACE THE SAME TEMPLATE ON THE INSIDE OF THE GLOVE BOX ON THE DRIVER SIDE. MARK THE INSIDE OF THE GLOVE BOX ALONG THE FRONT OF THE TEMPLATE AS SHOWN BELOW.CUT SIDES OF GLOVE BOX. MARK THE BOTTOM CONNECTING EACH SIDE OF GLOVE BOX THAT WAS JUST CUT, AND DISCARD THE FRONT PORTION OF THE BOX. INSTALL THE NEW SUPPLIED GLOVE BOX BY PRESSING THE S-CLIPS ONTO THE OEM PORTION OF THE BOXAS SHOWN IN FIGURE 17a, BELOW.
OEM with A/CGLOVE BOX
DRIVER SIDEOF GLOVE BOX MODIFIED GLOVE
BOX
S-CLIP
S-CLIP
S-CLIP
S-CLIP
FACTORY AIR GLOVE BOX
TEMPLATE
FACTORY AIR GLOVE BOX
TEMPLATE
FIGURE 17 FIGURE 17aPASSENGER SIDEOF GLOVE BOX
CUT BOX WITH AHACK SAW BLADEON THESE (3) FRONTLINES ONLY.
DISCARD FRONTPORTION OFBOX.
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19904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 19 OF 27
CONTROL PANEL & DUCT HOSE ROUTING
FIGURE 18
PLUGFROM
CONTROLWIRING
HARNESS232007-VUR
PLUGFROM
WIRINGHARNESS
232001-VUR
PASSENGER SIDEDEFROST DUCT
2” x 12”
DRIVER SIDEDEFROST DUCT
2” x 28”
OFF
DASH
HOT
FLRA/C
HI
DEF
COLD
PASSENGER SIDELOUVER
2 ½” x 45”
CENTER DRIVER SIDE LOUVER
2 ½” x 28”
DRIVER SIDELOUVER
2 ½” x 26”
CENTER PASSENGERSIDE LOUVER
2 ½” x 15”
![Page 20: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/20.jpg)
20904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 20 OF 27
WHT/GRN
WHT/YELWHT/RED
RED
WHTBACKLIGHT NEG
FAN WIPER
MODE WIPER
TEMP WIPER
5V-SW
GND
BACKLIGHT POS
AC ANNUNCIATOR
PRE-WIRED
GEN IV WIRING DIAGRAMREV D, 5/6/2014
GEN IV ECU
PROGRAM
Wiring Diagram
TEMP
MODE
FAN
A/C(IF USED)
232007-VUR
232002-VUA
** CIRCUITBREAKER30 AMP
*** WIDE OPENTHROTTLESWITCH
(OPTIONAL)
* DASH LAMP(IF USED)
Dash Lamp Is Used Only With Type 232007-VUR Harness.Warning: Always Mount Circuit Breaker As Close to the Battery As Possible. (NOTE: Wire BetweenBattery and Circuit Breaker Is Unprotected and Should Be Carefully Routed to Avoid a ShortCircuit).Wide Open Throttle Switch Contacts Close Only at Full Throttle, Which Disables A/C Compressor.
JF8
BLK
ORA
TAN
VIEWED FROM WIRE SIDE
••
•
HEATERCONTROL VALVE
![Page 21: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/21.jpg)
21904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 21 OF 27
RED
CIRCUIT BREAKER30 AMP
+
+
-
BLACK
REDWHITE
RED
CHASSIS GROUND
A/CCOMPRESSOR
RELAY
Ignition Switch:
Dash Light:
NOTE: MOUNT RELAYIN DESIRED LOCATION
UNDER DASH
GREEN
FIREWALL
BLUE
BLUE
RED &
WHITE
VIOLET
(IGNITION HOTTERMINAL)
IGNITION SWITCH
DASH BACK LIGHT+0-12vTAN
GRAY
BLUE
WHITE
WHITE
REDRED
WHITE
COMPRESSOR
BATTERY
NOTE: CONNECT WHITEWIRES DIRECTLY TO
(-) BATTERY TERMINAL
BATRUN
12V
RED GREEN
RED
RED
BLUE
LATCH
BLACK
BINARYSAFETYSWITCH
YELLOW
ORANGE
WIRING HARNESS
Violet 12V Ign Switch Source (Key On Accessory) Position Must Be Switched.
Tan Wire Used Only With Vintage Air Supplied Control Panel With LED Back Light.
Binary: Connect As Shown (Typical Compressor Wiring). Be Sure Compressor Body Is Grounded.
Trinary Switch: Connect According To Trinary Switch Wiring Diagram.
Install With Servo Motor Facing Down, As Shown. Note Flow Direction Arrow Molded Into Valve Body, And Install Accordingly.
White Must Run To (-) Battery. Red May Run To (+) Battery Or Starter. Mount Circuit Breaker As Close to Battery As Possible.
Heater Control Valve:
Binary/Trinary & Compressor:
Circuit Breaker/Battery:
CONTROL WIRING HARNESS
NOTE: YELLOW & ORANGE
COMING FROM HARNESS ARE NOT
USED.
WIRING HARNESS
GRAY WIRE IS USED FOR PROGRAMING CONTROLS
IF APPLICABLE
WIRING HARNESS
Gen IV Wiring Connection Instruction
HEATERCONTROL VALVE
WARNING: ALWAYS MOUNT CIRCUIT BREAKER
AS CLOSE TO THE BATTERY AS POSSIBLE. (NOTE: WIRE BETWEEN BATTERY AND CIRCUIT BREAKER IS UNPROTECTED
AND SHOULD BE CAREFULLY ROUTED TO AVOID A SHORT CIRCUIT).
NOTE: HEATER CONTROL VALVE CONNECTION AND CHASSIS GROUND MAY BE LOCATED ON EITHER SIDE OF THE FIREWALL. ENSURECONNECTOR IS LATCHED
FIRMLY.
![Page 22: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/22.jpg)
22904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 22 OF 27
BLOWER SPEEDADJUST TO DESIRED
SPEED
TEMPERATURE LEVERSLIDE THE TEMPERATURE LEVER ALL THE WAY LEFTTO THE HOT POSITION.
(SLIDE LEVER LEFT OR RIGHT TO DESIRED TEMPERATURE)
SLIDE THE LEVER TOTHE CENTER POSITION
MODE LEVER
BLOWER SPEEDADJUST TO DESIRED
SPEED
SLIDE THE LEVER TO THE LEFT POSITION
MODE LEVER
TEMPERATURE LEVERADJUST TO DESIRED
SPEED
BLOWER SPEED
SLIDE THE LEVER TOTHE RIGHT POSITION
MODE LEVER
DEFROST/ DE-FOG MODE
HEAT MODE
A/C MODE
MODELEVER
OPERATION OF CONTROLS
ADJUST LEVER TODESIRED TEMPERATURE.
(COMPRESSOR IS AUTOMATICALLY
ENGAGED)
TEMPERATURE LEVERIN A/C MODE SLIDE THE TEMPERATURE LEVER ALL THE WAY TO THE RIGHT
TO ENGAGE COMPRESSOR.(SLIDE LEVER LEFT OR RIGHT
TO ADJUST DESIRED TEMPERATURE)
COLDHOTA/C
DASH FLR DEF
OFF HI BLOWERSPEED
TEMPERATURELEVER
COLDHOTA/C
DASH FLR DEF
OFF HI
COLDHOTA/C
DASH FLR DEF
OFF HI
NOTE: WHEN BATTERY POWER IS FIRST CONNECTED TO THE ECU, THE MICROPROCESSOR GOES THROUGH ANINITIALIZATION SEQUENCE. THIS INITIALIZATION MAY TAKE UP TO 30 SECONDS. DURING INITIALIZATION, THE BLOWERWILL NOT OPERATE, BUT THE DOORS INSIDE THE UNIT WILL BE OPERATING. A LOW BATTERY OR DISCONNECTING THEBATTERY MAY ALSO TRIGGER A REINITIALIZATION. DURING START UP, A LOW BATTERY MAY DROP BELOW 7 VOLTS,TRIGGERING REINITIALIZATION.
![Page 23: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/23.jpg)
23904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 23 OF 27
Sym
pto
m
C
on
dit
ion
Ch
eck
s
Act
ion
s
N
ote
s
Blo
wer
sta
ys o
n
hig
h s
pee
d w
hen
ig
nitio
n is
on.
1a.
No o
ther
funct
ions
work
.
Chec
k fo
r dam
aged
pin
s or
wires
in c
ontr
ol hea
d p
lug.
Ver
ify
that
all
pin
s ar
e in
sert
ed into
plu
g.
Ensu
re t
hat
no
pin
s ar
e ben
t or
dam
aged
in E
CU
.
Chec
k fo
r dam
aged
gro
und
wire
(white)
in c
ontr
ol hea
d
har
nes
s.
Ver
ify
continuity
to c
has
sis
gro
und w
ith w
hite
contr
ol
hea
d w
ire
at v
ario
us
poin
ts.
Loss
of gro
und o
n t
his
wire
render
s co
ntr
ol hea
d
inoper
able
.
All
oth
er f
unct
ions
work
.Chec
k fo
r dam
aged
blo
wer
sw
itch
or
pote
ntiom
eter
and
asso
ciat
ed w
irin
g.
Blo
wer
sta
ys o
n
hig
h s
pee
d w
hen
ig
nitio
n is
on o
r off.
Unplu
g 3
-wire
BSC c
ontr
ol
connec
tor
from
ECU
. If
blo
wer
sh
uts
off,
ECU
is
eith
er
impro
per
ly w
ired
or
dam
aged
.
Be
sure
the
smal
l, 2
0 G
A w
hite
gro
und w
ire
is c
onnec
ted
to t
he
bat
tery
gro
und p
ost
. If
it
is,
repla
ce t
he
ECU
.
Unplu
g 3
-wire
BSC c
ontr
ol
connec
tor
from
ECU
. If
blo
wer
st
ays
runnin
g,
BSC is
eith
er
impro
per
ly w
ired
or
dam
aged
.
Chec
k to
ensu
re t
hat
no B
SC w
irin
g is
dam
aged
or
short
ed t
o v
ehic
le g
round.
The
BSC o
per
ates
the
blo
wer
by
gro
und s
ide
puls
e w
idth
modula
tion s
witch
ing.
The
posi
tive
wire
to t
he
blo
wer
will
alw
ays
be
hot.
If th
e “g
round”
side
of
the
blo
wer
is
short
ed t
o c
has
sis
gro
und,
the
blo
wer
will
run o
n H
I.
Rep
lace
BSC (
This
will
req
uire
rem
oval
of
evap
ora
tor
from
veh
icle
).N
o o
ther
par
t re
pla
cem
ents
sh
ould
be
nec
essa
ry.
Com
pre
ssor
will
not
turn
on
(All
oth
er funct
ions
work
).
2.
Sys
tem
is
not
char
ged
.Sys
tem
must
be
char
ged
for
com
pre
ssor
to e
ngag
e.Char
ge
syst
em o
r byp
ass
pre
ssure
sw
itch
.
Dan
ger:
Never
byp
ass
sa
fety
sw
itch
wit
h
en
gin
e r
un
nin
g.
Seri
ou
s in
jury
can
resu
lt.
Sys
tem
is
char
ged
.
1b
.
Tro
ub
lesh
oo
tin
g G
uid
e
Chec
k fo
r fa
ulty
A/C
pote
ntiom
eter
or
asso
ciat
ed
wirin
g (
Not
applic
able
to 3
-pot
contr
ols
).
Chec
k fo
r dis
connec
ted o
r fa
ulty
ther
mis
tor.
Chec
k co
ntinuity
to g
round o
n w
hite
contr
ol hea
d w
ire.
Chec
k fo
r 5V o
n r
ed c
ontr
ol hea
d w
ire.
Chec
k 2-p
in c
onnec
tor
at E
CU
housi
ng.
To c
hec
k fo
r pro
per
pot
funct
ion,
chec
k vo
ltag
e at
w
hite/
blu
e w
ire.
Voltag
e sh
ould
be
bet
wee
n 0
V a
nd
5V,
and w
ill v
ary
with p
ot
leve
r posi
tion.
Dis
connec
ted o
r fa
ulty
ther
mis
tor
will
cau
se
com
pre
ssor
to b
e dis
able
d.
Red
wire
at A
/C p
ot
should
hav
e ap
pro
xim
atel
y 5V
with ignitio
n o
n.
White
wire
will
hav
e co
ntinuity
to
chas
sis
gro
und.
White/
Blu
e w
ire
should
var
y bet
wee
n 0
V a
nd 5
V w
hen
le
ver
is m
oved
up o
r dow
n.
3. Com
pre
ssor
will
not
turn
off
(A
ll oth
er funct
ions
work
).
Chec
k fo
r fa
ulty
A/C
pote
ntiom
eter
or
asso
ciat
ed
wirin
g.
Chec
k fo
r fa
ulty
A/C
rel
ay.
Rep
air
or
repla
ce p
ot/
contr
ol w
irin
g.
Rep
lace
rel
ay.
See
blo
wer
sw
itch
chec
k pro
cedure
.
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24904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 24 OF 27
Sym
pto
m
C
on
dit
ion
Ch
eck
s
Act
ion
s
N
ote
s
Sys
tem
will
not
turn
on,
or
runs
inte
rmitte
ntly.
4.
Work
s w
hen
engin
e is
not
runnin
g;
shuts
off w
hen
en
gin
e is
sta
rted
(T
ypic
ally
ear
ly G
en I
V,
but
poss
ible
on a
ll ve
rsio
ns)
.
Nois
e in
terf
eren
ce f
rom
either
ig
nitio
n o
r al
tern
ator.
Inst
all ca
pac
itors
on ignitio
n c
oil
and a
lter
nat
or. E
nsu
re
good g
round a
t al
l poin
ts.
Rel
oca
te c
oil
and a
ssoci
ated
w
irin
g a
way
fro
m E
CU
and E
CU
wirin
g.
Chec
k fo
r burn
edor
loose
plu
g w
ires
.
Ver
ify
connec
tions
on p
ow
er
lead
, ig
nitio
n lea
d,
and b
oth
white
gro
und w
ires
.
Ver
ify
pro
per
met
er f
unct
ion b
y ch
ecki
ng t
he
conditio
n o
f a
know
n g
ood b
atte
ry.
Ignitio
n n
ois
e (r
adia
ted o
rco
nduct
ed)
will
cau
se t
he
syst
em t
o s
hut
dow
n d
ue
tohig
h v
oltag
e sp
ikes
. If
this
is s
usp
ecte
d,
chec
k w
ith a
qual
ity
osc
illosc
ope.
Spik
esgre
ater
than
16V w
ill s
hut
dow
n t
he
ECU
. In
stal
l a
radio
cap
acitor
at t
he
posi
tive
post
of th
e ig
nitio
nco
il (S
ee r
adio
cap
acitor
inst
alla
tion b
ulle
tin).
A
faulty
alte
rnat
or
or
worn
out
bat
tery
can
als
o r
esult
in t
his
conditio
n.
Will
not
turn
on u
nder
an
y co
nditio
ns.
Ver
ify
bat
tery
voltag
e is
gre
ater
than
10 v
olts
and les
sth
an 1
6.
Loss
of m
ode
door
funct
ion.
No m
ode
chan
ge
at a
ll.Chec
k fo
r dam
aged
mode
switch
or
pote
ntiom
eter
and
asso
ciat
ed w
irin
g.
Part
ial fu
nct
ion o
f m
ode
doors
.
Typic
ally
cau
sed b
y ev
apora
tor
housi
ng
inst
alle
d in a
bin
d in t
he
vehic
le.
Be
sure
all
mounting loca
tions
line
up
and d
on’t h
ave
to b
e fo
rced
in
to p
osi
tion.
Blo
wer
turn
s on
and o
ff r
apid
ly.
6.
Bat
tery
voltag
e is
at
leas
t 12V.
Chec
k fo
r at
lea
st 1
2V a
t ci
rcuit b
reak
er.
Ensu
re a
ll sy
stem
gro
unds
and p
ow
er c
onnec
tions
are
clea
n a
nd t
ight.
Bat
tery
voltag
e is
les
s th
an 1
2V.
5.
Tro
ub
lesh
oo
tin
g G
uid
e (
Co
nt.
)
Chec
k fo
r fa
ulty
bat
tery
or
alte
rnat
or.
Char
ge
bat
tery
.
Sys
tem
shuts
off b
low
er a
t 10V.
Poor
connec
tions
or
wea
k bat
tery
can
cau
se
shutd
ow
n a
t up t
o 1
1V.
7. When
ignitio
n is
turn
ed o
n,
blo
wer
m
om
enta
rily
co
mes
on,
then
sh
uts
off.
This
occ
urs
with t
he
blo
wer
sw
itch
in
the
OFF
posi
tion.
This
is
an indic
ator
that
the
syst
em h
as b
een r
eset
. Be
sure
the
red p
ow
er w
ire
is o
nth
e bat
tery
post
, an
d n
ot
on a
sw
itch
ed s
ourc
e. A
lso,
if
the
syst
em is
pulle
d b
elow
7V f
or
even
a s
plit
sec
ond,
the
syst
em w
ill r
eset
.
Run r
ed p
ow
er w
ire
direc
tly
to b
atte
ry.
Chec
k fo
r posi
tive
pow
er a
t hea
ter
valv
e gre
en w
ire
and
blo
wer
red
wire.
Chec
k fo
r gro
und o
n c
ontr
ol hea
d w
hite
wire.
Chec
k fo
r obst
ruct
ed o
r bin
din
g m
ode
doors
.
Chec
k fo
r dam
aged
ste
pper
m
oto
r or
wirin
g.
Err
atic
funct
ions
of
blo
wer
, m
ode,
te
mp,
etc.
Chec
k fo
r dam
aged
sw
itch
or
pot
and a
ssoci
ated
wirin
g.
Rep
air
or
repla
ce.
8.
![Page 25: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/25.jpg)
25904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 25 OF 27
CUT ALONGDOTTED LINE
73-87 CHEV P-UP GLOVE BOX
MODIFICATIONTEMPLATE
GLOVE BOX MODIFICATION TEMPLATE
![Page 26: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/26.jpg)
![Page 27: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/27.jpg)
26904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 26 OF 27
NOTE: USE ILLUSTRATIONS BELOW TO DETERMINE POWER STEERING BRACKET, VERSION 1 OR 2.CUT ALONG DASHED LINES AND ALIGN THE TEMPLATE HOLE AND ADJUSTMENT SLOT WITH THE HOLE AND ADJUSTMENT SLOT ON THE POWER STEERING BRACKET.MARK THE BRACKET AROUND THE PERIMETER OF THE TEMPLATE.CUT AND REMOVE THE SHADED PORTION OF THE POWER STEERING BRACKET AS SHOWN BELOW.DISCARD THE A/C COMPRESSOR MOUNTING PORTION OF THE BRACKET.REINSTALL THE POWER STEERING BRACKET ON THE POWER STEERING PUMP.
POWER STEERING BRACKET MODIFICATION
FOLD
FOLD
CUT & REMOVESHADED PORTION
CUT ALONGDOTTED LINE
CUT ALONGDOTTED LINE
1973-87 CHEVY P-UP w/ ACPOWER STEERING BRACKET
TEMPLATEVERSION 2
1973-87 CHEVY P-UPw/ AC
POWER STEERING BRACKETTEMPLATEVERSION 1
VERSION 1 VERSION 2
![Page 28: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/28.jpg)
![Page 29: 1973-80 CHEVROLET PICKUP - Vintage Air1973-80 CHEVROLET PICKUP with FACTORY AIR 754175 904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 1 OF 27 an ISO 9001:2008 Registered](https://reader036.fdocuments.us/reader036/viewer/2022071417/6114bb4c0fd777127a456116/html5/thumbnails/29.jpg)
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904184 REV C 1/19/15, INST 73-80 CHEV P-UP w/ AC EVAP KIT PG 27 OF 27
1
ACCESSORY KIT794175
GEN IV 4-VENTEVAPORATOR SUB CASE
with 204 ECU744004-VUE
NOTE: IMAGES MAY NOT DEPICT ACTUAL PARTS AND QUANTITIES.REFER TO PACKING LIST FOR ACTUAL PARTS AND QUANTITIES.
CHECK BY:PACKED BY:
DATE:
EVAPORATOR KIT754175
1.2.
11
744004-VUE794175
GEN IV 4-VENT EVAPORATOR SUB CASE with 204 ECU ACCESSORY KIT 1973-80 CHEV P-UP with A/C
No. QTY. PART No. DESCRIPTION
EVAPORATOR KIT PACKING LIST
2
OFF
DASH
HOT
FLR
A/C
HI
DEF
COLD