an ISO 9001:2008 Registered Company

1967-68 Ford Mustang,Mercury Cougar

with Factory AirEvaporator Kit

(554168)

18865 Goll St. San Antonio, TX 78266 Phone: 210-654-7171

Fax: 210-654-3113www.vintageair.com

904178 REV F 11/18/16, PG 1 OF 23

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904178 REV F 11/18/16, PG 2 OF 23

Thank you for purchasing this evaporator kit from Vintage Air. When installing these components as part of a complete SureFit™ system, Vintage Air recommends working from front to back on the vehicle, installing the condenser kit, hose kit, and compressor first, followed by the wiring, evaporator, and finally the control panel.

Cover..................................................................................................................................Table of Contents.................................................................................................................Packing List/Parts Disclaimer..................................................................................................Information Page..................................................................................................................Wiring Notice.......................................................................................................................Engine Compartment Disassembly, Condenser Assembly and Installation, Compressor and Brackets..............................................................................................................................Passenger Compartment Disassembly...................................................................................... Defrost Duct and Fresh Air Cap Installation..............................................................................Firewall Cover Installation.....................................................................................................Evaporator Installation........................................................................................................Louver Installation..............................................................................................................Drain Hose Installation, Lubricating O-rings, A/C Hose Installation............................................Heater Hose & Heater Control Valve Installation......................................................................A/C and Heater Hose Routing............................................................................................... Final Steps......................................................................................................................... Control Panel & Duct Hose Routing........................................................................................ Evaporator Hardline Installation............................................................................................Wiring Diagram..................................................................................................................Gen IV Wiring Connection Instruction....................................................................................Operation of Controls..........................................................................................................Troubleshooting Guide.........................................................................................................Troubleshooting Guide (Cont.)..............................................................................................Packing List.......................................................................................................................

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904178 REV F 11/18/16, PG 3 OF 23

Packing List: Evaporator Kit (554168)

No. 1.2.

Qty.11

Part No.762169785167

DescriptionGen IV 4-Vent with 2” & 2 ½” Evaporator Sub CaseAccessory Kit

** 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.

NOTE: Images may not depict actual parts and quantities. Refer to packing list for actual parts and quantities.

1

2

Gen IV 4-Vent with 2” & 2 ½”

Evaporator Sub Case762169

Accessory Kit785167

4

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904178 REV F 11/18/16, PG 4 OF 23

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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904178 REV F 11/18/16, PG 5 OF 23

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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904178 REV F 11/18/16, PG 6 OF 23

Condenser Assembly and Installation1.2.

Refer to separate instructions included with the condenser kit to install the condenser.Binary switch installation (Refer to condenser instructions).

Compressor and Brackets1. Refer to separate instructions included with the bracket kit to install the compressor bracket.

Engine Compartment Disassembly

1.2.3.4.5.6.7.8.

Disconnect battery.Remove battery (retain).Drain radiator.Remove radiator (retain).Evacuate the A/C system if necessary.Remove the OEM condenser and drier (discard) (See Figure 1, below).Remove the OEM compressor and bracket (discard) (See Figure 1, below). Remove the OEM heater & A/C hoses (discard) (See Figure 1, below).

NOTE: Before starting the installation, check the function of the vehicle (horn, lights, etc.) for proper operation, and study the instructions, illustrations, & diagrams.Perform the Following:

Figure 1

Compressor and Bracket

A/C Hoses

Drier

Condenser

Radiator

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904178 REV F 11/18/16, PG 7 OF 23

Passenger Compartment Disassembly

1.2.3.

4.

5.6.7.8.

Remove the glove box (retain) (See Figure 2, below).Remove the center console (if equipped).Remove the A/C & heater assembly and all related ducting (discard, but retain screws) (See Figure 2a, below).Remove the driver side louver/control panel (retain) (See Figure 2a, below). NOTE: Refer to control panel conversion kit instructions for installation of controls.Remove the passenger side louver (retain) (See Figure 2a , below).Remove the radio (retain) (See Figure 2a, below).Remove the OEM defrost duct assembly (See Figure 2a, below).Remove the dash brace (discard) (See Figure 2a, below).

Perform the Following:

Figure 2

Figure 2a

MUSTANG

Glove Box

Driver Side Louver/

Control PanelDefrost

Duct Assembly

RadioDashBrace

Passenger SideLouver

A/C, Heater Assembly& Related Ducting

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904178 REV F 11/18/16, PG 8 OF 23

Defrost Duct and Fresh Air Cap Installation

1.2.3.4.5.

Install the defrost ducts under the dash, and secure using (4) OEM nuts as shown in Figure 3, below.Hold the fresh air cap under the dash and mark the (3) mounting holes.Drill (3) 1/8” mounting holes under the dash (See Figure 3, below).Apply a 1/4” bead of silicone around the mating surface of the fresh air cap as shown in Figure 3, below.Secure the fresh air cap to the fresh air hole using (3) #10 x 1/2” sheet metal screws as shown in Figure 3, below.

Figure 3

Driver SideDefrost Duct

626676

Passenger SideDefrost Duct

626680

(4) OEMNuts

(3) #10 x 1/2”Sheet Metal

Screws

Fresh AirCap

62354-VFE

Silicone

Drill (3) 1/8” Holes

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904178 REV F 11/18/16, PG 9 OF 23

Figure 4a

Figure 4#10 x 1/2”Sheet Metal

Screw

Silicone

Firewall Cover Installation1.2.3.

Install (3) grommets onto the firewall cover as shown in Figure 4, below.Apply a 1/4” bead of silicone around the mating surface of the firewall cover as shown in Figure 4a, below.Secure the firewall cover to the firewall using (4) 1/4-20 x 1” hex bolts, flat washers, nuts, and (1) #10 x 1/2” sheet metal screw (See Figure 4, below). NOTE: The firewall cover installs on the engine compartment side of the firewall.

EngineCompartment

Side of Firewall

FirewallCover

642068

Grommet33137-VUI

Grommet33134-VUI

Grommet33135-VUI

(4) 1/4-20 x 1”Hex Bolts

and Washers

OEMHole

(4) 1/4” Nutswith Star Washers

(4) 1/4” Flat Washers

OEM HeaterCore Holes

(4) OEMBlower Motor

Mounting Holes

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904178 REV F 11/18/16, PG 10 OF 23

Figure 5

Figure 5a Figure 5b

Evaporator Installation

1.

2.

3.

4.

5.

6.

On a workbench, install the evaporator rear brackets and hardlines with properly lubricated O-rings (See Figure 8, Page 12, and Figure 14, Page 17).Install the front mounting bracket onto the evaporator using (2) 1/4-20 x 1/2” hex bolts, and tighten as shown in Figure 5, below.Lift the evaporator unit up under the dashboard. Secure loosely to the firewall from the engine compartment side using (2) 1/4-20 nuts and washers (See Figure 5a, below). 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 around the drain.Using the front evaporator bracket as a guide, mark and drill (2) 3/16” holes in the cowl (See Figure 5b, below).Using (2) #14 x 3/4” sheet metal screws, secure the front evaporator mounting bracket to the inner cowl (See Figure 5b, below).Verify that the evaporator unit is level and square to the dash; then tighten all mounting bolts. NOTE: Tighten the bolt on the firewall first. Then tighten the front mounting bracket sheet metal screws.

NOTE: To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts passing through the firewall, Vintage Air recommends coating the threads with silicone prior to installation.

Evaporator Front Bracket643169-FCB

(2) 1/4-20 x 1/2”Hex Bolts

OEMHole

OEMHole

Passenger SideEvaporator

Mounting Hole

Driver SideEvaporator

Mounting Hole

Approximately 3”

Approximately 3 ½”

OEM HeaterCore Holes

(2) 1/4-20 Nutsand Flat Washers

Passenger Compartment

Side of Firewall

Drill (2) 3/16”

Holes

(2) #14 x 3/4”Sheet Metal

Screws

InnerCowl

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904178 REV F 11/18/16, PG 11 OF 23

Figure 6

Louver Installation1.2.

3.4.

Install S-clips onto the center louver hose adapter (See Figure 6, below).Install the center louver hose adapter onto the outside of the OEM center louver assembly through the radio opening as shown in Figure 6, below.Remove the driver and passenger side louver door flaps (See Figure 6, below).Reinstall the louvers into the dash.

MUSTANG

Center LouverHose Adapter

626679

(2) S-clipsDriver &

Passenger Side Louver

DoorFlap

12

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904178 REV F 11/18/16, PG 12 OF 23

Figure 7

Figure ##

O-ring Installs Over Male Insert to Swaged Lip

O-ring#6 O-ring

#8 O-ring #10 O-ring

O-ring

Supplied Oil for O-rings

Male Insert

Female Nut

Hold With This Wrench

Twist With This Wrench

Lubricating O-rings For a proper seal of fittings: Install supplied O-rings as shown, and lubricate with supplied oil.

NOTE: Standard torque specifications:#6: 11 to 13 ft-lb.#8: 15 to 20 ft-lb.

#10: 21 to 27 ft-lb.

Figure 8

Drain Hose Installation1.2.

3.4.

Locate the evaporator drain on the bottom of the evaporator case.In line with the drain, lightly make a mark on the firewall. Then, measure 1” down and drill a 5/8” hole through the firewall (See Figure 7, below).Install the drain hose onto the evaporator drain on the bottom of the unit, and route it through the firewall.Install a 1/2” 90° drain elbow onto the drain hose (See Figure 7, below).

1”

1/2” Drain Elbow

DrainHose

Drain

A/C Hose Installation

1.

2.

3.

4.

Locate the #8 compressor A/C hose. Lubricate (2) #8 O-rings (See Figure 8, above) and connect the 45° fitting to the #8 discharge port on the compressor. Then route the straight female fitting with service port to the #8 condenser hardline coming through the radiator core support (See Figure 10, Page 14). Tighten each fitting connection as shown in Figure 8, above.Locate the #10 compressor A/C hose. Lubricate (2) #10 O-rings (See Figure 8, above) and connect the 90° female fitting with service port to the #10 suction port on the compressor. Then route the 90° female fitting to the #10 evaporator hardline coming through the firewall (See Figure 9, Page 13, & Figure 10, Page 14). Tighten each fitting connection as shown in Figure 8, above. Wrap the #10 fitting connections with press tape (See Figure 9, Page 13).Locate the #6 evaporator/drier hose. Lubricate (2) #6 O-rings (See Figure 8, above) and connect the straight female fitting to the #6 drier hardline coming through the radiator core support. Then route the 90° female fitting to the #6 evaporator hardline coming through the firewall (See Figure 9, Page 13). Tighten each fitting connection as shown in Figure 8, above.Use (6) tie wraps to secure the #6 A/C hose to the brace as shown in Figure 10, Page 14.

Standard Hose Kit:

1. Refer to separate instructions included with modified hose kit.Modified Hose Kit:

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904178 REV F 11/18/16, PG 13 OF 23

Figure 9

Heater Hose & Heater Control Valve Installation

1.

2.

Route a piece of heater hose from the water pump to the lower heater line coming through the firewall as shown in Figure 9, below. Secure using hose clamps.Route a piece of heater hose from the intake to the upper heater line coming through the firewall as shown in Figure 9, below. NOTE: Install the heater control valve in line with the intake manifold (pressure side) heater hose, and secure using hose clamps. Also note proper flow direction.

FROM EVAPORATOR

TO WATER PUMP

FROM INTAKEMANIFOLD

FROM HTR CNTRL VLV

TO EVAPORATOR

ECUModule

PressTape

#10 Hardline (Insulated)

ExpansionValve

Firewall

Firewall Cover642068

O-rings

#10 A/C Hose

#6 A/CHose

HeaterHose

NOTE: Flow Direction Follows Molded Arrow on Valve.

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14 904178 REV F 11/18/16, PG 14 OF 23

Fig

ure

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ps#

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ose

#8

A/C

Hos

e#

6 A/C

Hos

e

Inne

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nder

wel

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#8

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dens

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oCor

e Sup

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Drier

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Har

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(Ref

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stru

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In

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15

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904178 REV F 11/18/16, PG 15 OF 23

Figure 11

Figure 12a

Figure 12

Final Steps1.2.

3.4.

5.6.7.8.

9.10.11.

12.13.

Install duct hoses as shown in Figure 13, Page 16.Route A/C wires (12 volt/grounds/binary switch/heater valve) through 3/8” grommet as shown in Figure 11, below.Install control panel assembly. Refer to control panel instructions.Plug the wiring harnesses into the ECU module on the sub case as shown in Figure 13, Page 16. Wire according to the wiring diagrams on Pages 18 and 19.Reinstall the glove box.Reinstall the center console (if equipped). Modify console as shown in Figures 12 & 12a, below.Reinstall all previously removed items.Fill radiator with at least a 50/50 mixture of approved antifreeze and distilled water. It is the owner’s responsibility to keep the freeze protection at the proper level for the climate in which the vehicle is operated. Failure to follow antifreeze recommendations will cause heater 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 licensed automotive A/C technician.Evacuate the system for a minimum of 45 minutes prior to charging, and perform a leak check prior to servicing.Charge the system to the capacities stated on Page 4 of this instruction manual.See Operation of Controls procedures on Page 20.

¾”3 ¾”

MUSTANG

3/8” Grommet

FirewallCover

OEM

Passenger SideUnder Dash

Console

Cut &Remove

Top Side

16

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904178 REV F 11/18/16, PG 16 OF 23

Figure X

Control Panel & Duct Hose Routing

Passenger SideDefrost Duct

2” x 14”

Driver SideDefrost Duct

2” x 26”

Passenger SideLouver

2 ½” x 60”

Driver SideLouver

2 ½” x 36” Driver Side Center Louver

2” x 20”

Passenger Side Center Louver

2” x 20”

Plug FromWiring

Harness232600-VUA

Plug FromControlWiring

Harness232002-VUA

Figure 13

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17 904178 REV F 11/18/16, PG 17 OF 23

Fig

ure

14

Evap

orat

or H

ard

line

Inst

alla

tion

Bra

cket

1/4”

Pus

h N

ut

1/4-

20 x

1”

Hex

Bol

t

Drive

r Sid

e Ev

apor

ator

Rear

Bra

cket

6412

73

Hea

ter

Line

(Eva

pora

tor

to I

ntak

e)08

1066

Hea

ter

Line

(Eva

pora

tor

to

Wat

er P

ump)

0810

67

#6

Har

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1064

(2)

#10

O-r

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#10

O-r

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(2)

1/4-

20 x

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(Loc

ated

on

Sub

Cas

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#6

O-r

ing

#10

Har

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1065

Pres

s Ta

pe

ECU

Mod

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Sid

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apor

ator

Rear

Bra

cket

6412

72

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er in

stal

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18

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904178 REV F 11/18/16, PG 18 OF 23

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

19

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904178 REV F 11/18/16, PG 19 OF 23

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.

20

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904178 REV F 11/18/16, PG 20 OF 23

TemperatureControl

ModeControl

HI

FRESH

WARM

MAX MAXCOOL

OFF

HEAT

DEF

AIR TEMP FAN

HI

FRESH

WARM

MAX MAXCOOL

OFF

HEAT

DEF

AIR TEMP

FAN

HI

FRESH

WARM

MAX MAXCOOL

OFF

HEAT

DEF AIR

TEMP

FAN

HI

FRESH

WARM

MAX MAXCOOL

OFF

HEAT

DEF

AIR

TEMP

FAN

Blower Speed

Operation of Controls

Adjust to desiredspeed.

Blower SpeedAdjust to desired

speed.

Adjust to desiredmode position (DASH position recommended).

Adjust to desiredspeed.

Adjust to DEFROST position for maximum defrost, or between FLOOR and DEFROST positions for a bi-level

blend (Compressor is automatically engaged).

Adjust to desired temperature.

For A/C operation, adjust tocoldest position to engage

compressor (Adjust between HOT and COLD to reachdesired temperature).

A/C Operation

Heat Operation

Defrost/De-fog Operation

On Gen IV systems with three lever/knob controls, the temperature control toggles between heat and A/C operations. To activate A/C, move the temperature lever/knob all the way to cold and then back it off to the desired vent temperature. For heat operation, move the temperature lever/knob all the way to hot and then adjust to the desired vent temperature. The blower will momentarily change speed, each time you toggle between operations, to indicate the change. NOTE: For proper control panel function, refer to control panel instructions for calibration procedure.

Blower Speed

Blower Speed

This lever/knob controlsblower speed, from

OFF to HI.

This lever/knob controls the mode positions,from DASH to FLOORto DEFROST, with a blend in between.

This lever/knob controlsthe temperature,

from HOT to COLD.

Blower Speed

Mode Control

Temperature Control

Temperature Control

Temperature Control

Temperature Control

Mode Control

Mode Control

Mode Control

For maximum heating, adjust to hottest position (Adjust between HOT and COLD to reach desired temperature).Adjust to desired

mode position(FLOOR position recommended).

ww

w.v

inta

gea

ir.c

om

21 904178 REV F 11/18/16, PG 21 OF 23

Sym

pto

m

C

on

dit

ion

C

heck

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

.

ww

w.v

inta

gea

ir.c

om

22 904178 REV F 11/18/16, PG 22 OF 23

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.

23

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904178 REV F 11/18/16, PG 23 OF 23

Packing List: Evaporator Kit (554168)

No. 1.2.

Qty.11

Part No.762169785167

DescriptionGen IV 4-Vent with 2” & 2 ½” Evaporator Sub CaseAccessory Kit

NOTE: Images may not depict actual parts and quantities. Refer to packing list for actual parts and quantities.

1

2

Checked By:Packed By:

Date:

Gen IV 4-Vent with 2” & 2 ½”

Evaporator Sub Case762169

Accessory Kit785167