ELECTRICAL SYSTEMS - Brunswick Marine in...

E4

72938

ELECTRICAL SYSTEMS

WIRING DIAGRAMS

4E-0 - WIRING DIAGRAMS 90-823226--1 996

Table of ContentsPage

Wiring Colors for MerCruiser 4E-1. . . . . . . . . . . . . . . MCM V-6 Alpha Thunderbolt IV 4E-2. . . . . . . . . . MCM V-6 Gen + Alpha Thunderbolt V Without Knock Sensor 4E-3. . . . . . . . . . . . . . . . . MCM V-6 Gen + Bravo Thunderbolt V Without Knock Sensor 4E-4. . . . . . . . . . . . . . . . . MCM 262 Magnum EFI Gen + Alpha and Bravo Starting and Charging Harness 4E-5. . . . MCM 262 Magnum EFI Gen + Alpha (VaporSeparator Tank [VST])EFI System Harness 4E-6. . . . . . . . . . . . . . . . . . . MCM 262 Magnum EFI Gen + Bravo (Vapor Separator Tank [VST])EFI System Harness 4E-7. . . . . . . . . . . . . . . . . . . MCM 262 Magnum EFI Gen + Alpha (Cool Fuel System) EFI System Harness 4E-8. MCM 262 Magnum EFI Gen + Bravo (Cool Fuel System) EFI System Harness 4E-9. Quicksilver Instrumentation 4E-10. . . . . . . . . . . . Dual Station Wiring (Using a Neutral SafetySwitch in Only One Remote Control) 4E-11. . . . Dual Station Wiring (Using A Neutral Safety Switch In Both Remote Controls) 4E-12. Dual Station Wiring (Using a Neutral Safety Switch in Engine Wiring Harness) 4E-13EFI Wiring Diagram (Chart 1 Of 4) 4E-14. . . . . . EFI Wiring Diagram (Chart 2 Of 4) 4E-15. . . . . . EFI Wiring Diagram (Chart 3 Of 4) 4E-16. . . . . . EFI Wiring Diagram (Chart 4 Of 4) 4E-17. . . . . .

WIRING DIAGRAMS - 4E-190-823226--1 996

Wiring Colors for MerCruiserNOTE: Color codes listed below DO NOT apply to fuel injection system harnesses.

BIA COLOR CODE AND ABBREVIATIONS WHERE USED

BLACK (BLK) All Grounds

BROWN (BLU) Reference Electrode - MerCathode

ORANGE (ORN) Anode Electrode-MerCathode

LT. BLUE/WHITE (LT BLU/WHT) Trim - ”Up” Switch

GRAY (GRY) Tachometer Signal

GREEN/WHITE (GRN/WHT) Trim - ”Down” Switch

TAN (TAN) Water Temperature Sender to Gauge

LIGHT BLUE (LIT BLU) Oil Pressure Sender to Gauge

PINK (PNK) Fuel Gauge Sender to Gauge

BROWN/WHITE (BRN/WHT) Trim Sender to Trim Gauge

PURPLE/WHITE (PUR/WHT) Trim - ”Trailer” Switch

RED (RED) Unprotected Wires from Battery

RED/PURPLE (RED/PUR) Protected (Fused) Wires from Battery

RED/PURPLE (RED/PUR) Protected (+12V) to Trim Panel

ORANGE (ORN) Alternator Output

PURPLE/YELLOW (PUR/YEL) Ballast Bypass

PURPLE (PUR) Ignition Switch (+12V)

YELLOW/RED (YEL/RED) Starter Switch to Starter Solenoid to Neutral StartSwitch


MCM V-6 Alpha Thunderbolt IV

71877

C

B

D

A

1 2

3

12

3

12

3

1

2

3

45

6

78

NEWSTYLE

BOTTLE

OLD STYLEBOTTLE

A -Ignition System1 -Distributor2 -Shift Cutout Switch3 -Ignition CoilB -Starting System1 -Alternator2 -Electric Choke3 -Ground Bolt4 -Starter5 -Circuit Breaker6 -Starter Slave Solenoid7 -Electric Fuel Pump8 -Oil Pressure Cut-Off Switch

C-Audio Warning System1 -Water Temperature2 -Drive Unit Oil Level (If Equipped)3 -Oil Pressure SwitchD -Instrumentation System1 -Oil Pressure Sender2 -Water Temperature Sender3 -Trim Sender


MCM V-6 Gen + Alpha Thunderbolt V Without Knock Sensor

1

2

3

1

2

3

4 5

6

12

3

1

3

A

B

2

8 774813

NOTE

C

D

NOTE: TAN/BLU wire is not used at distributor.A -Ignition System1 -Distributor2 -Shift Cutout Switch3 -Ignition CoilB -Starting System1 -Alternator2 -Electric Choke3 -Ground Bolt4 -Starter5 -Circuit Breaker6 -Starter Slave Solenoid7 -Electric Fuel Pump8 -Oil Pressure Cut-Off Switch



MCM V-6 Gen + Bravo Thunderbolt V Without Knock Sensor

1

1

23

45

6

12

3

1

3

A

2

8 7

2

74814

NOTE

C

B

D

A

NOTE: TAN/BLU wire is not used at distributor.A -Ignition System1 -Distributor2 -Ignition CoilB -Starting System1 -Alternator2 -Electric Choke (2 BBL Only)3 -Ground Bolt4 -Starter5 -Circuit Breaker6 -Starter Slave Solenoid7 -Fuel Pump8 -Oil Pressure Cut-Off Switch



MCM 262 Magnum EFI Gen + Alpha and Bravo Starting and Charging Harness

74925

b

c

a

1

2

32

1

1

2

3

4

5

d

C

B

A

76

A– Audio Warning System1 - Drive Unit Oil Level2 - Oil Pressure SwitchB– Instrumentation System1 - Trim Sender2 - Water Temperature Sender3 - Oil Pressure SenderC - Charging and Starting System1 - Starter Slave Solenoid2 - Circuit Breaker3 - Starter4 - Ground Stud5 - Alternator6 - Oil Pressure Cut-Off Switch7 - Fuel Pump

a - Harness Connector to EFI System Harnessb - Positive (+) Power Wire to EFI System Harnessc - Auxiliary Tachometer Leadd -90 Amp Fuse (DO NOT Remove)


MCM 262 Magnum EFI Gen + Alpha (Vapor Separator Tank [VST])EFI System Harness

74929

2

3

4

5

6

7

8

9

10

11

1

12

13

14

15

16

17

18

19

20

21

NOTE: All BLACK wires with a ground symbol are interconnected within the EFI system harness.

1 - Vapor Separator Tank (VST)2 - Throttle Body3 - Distributor4 - Coil5 - Knock Sensor (KS) Module6 - Data Link Connector (DLC)7 - Manifold Absolute Pressure (MAP) Sensor8 - Knock Sensor9 - Idle Air Control (IAC)10- Throttle Position (TP) Sensor

11- Engine Coolant Temperature Sensor (ECT)12- Electronic Control Module (ECM)13- Fuel Pump Relay14- Ignition/System Relay15- Fuel Pump Fuse16- ECM/Ignition Feed/KS Module/Injectors Fuse17- ECM/DLC/Battery Fuse18- Harness Connector To Starting/Charging Harness19- Shift Cutout Switch20- Lanyard Stop Switch21- Positive Power Wire To Engine Circuit Breaker


MCM 262 Magnum EFI Gen + Bravo (Vapor Separator Tank [VST])EFI System Harness

74928

2

3

4

5

6

7

8

9

10

11

1

12

13

14

15

16

17

18

19



11- Engine Coolant Temperature Sensor (ECT)12- Electronic Control Module (ECM)13- Fuel Pump Relay14- Ignition/System Relay15- Fuel Pump Fuse16- ECM/Ignition Feed/KS Module/Injectors Fuse17- ECM/DLC/Battery Fuse18- Harness Connector To Starting/Charging Harness19- Positive (+) Power Lead To Engine Circuit Breaker


MCM 262 Magnum EFI Gen + Alpha (Cool Fuel System)EFI System Harness

74929

2

3

4

5

6

7

8

9

10

11

1

12

13

14

15

16

17

18

19

20

21



11- Engine Coolant Temperature Sensor (ECT)12- Electronic Control Module (ECM)13- Fuel Pump Relay14- Ignition/System Relay15- Fuel Pump Fuse16- ECM/Ignition Feed/KS Module/Injectors Fuse17- ECM/DLC/Battery Fuse18- Harness Connector To Starting/Charging Harness19- Shift Cutout Switch20- Lanyard Stop Switch21- Positive Power Wire To Engine Circuit Breaker


MCM 262 Magnum EFI Gen + Bravo (Cool Fuel System)EFI System Harness

74928

2

3

4

5

6

7

8

9

10

11

1

12

13

14

15

16

17

18

19



11- Engine Coolant Temperature Sensor (ECT)12- Electronic Control Module (ECM)13- Fuel Pump Relay14- Ignition/System Relay15- Fuel Pump Fuse16- ECM/Ignition Feed/KS Module/Injectors Fuse17- ECM/DLC/Battery Fuse18- Harness Connector To Starting/Charging Harness19- Positive (+) Power Lead To Engine Circuit Breaker


Quicksilver Instrumentation

To E

ngin

e H

arne

ss

NOTE 1

NOTE 1

NOTE 1

NOTE 2

74046

2

5

6

7

8

9

13 4

LATER STYLEBUZZER

EARLY STYLEBUZZER

NOTE 1: Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection andslide rubber sleeve over connection.NOTE 2: Power for a second fused accessory panel may be taken from this connection. Load MUST NOT ex-ceed 35-40 amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK(ground) harness wire connected to it.1 - Tachometer2 - Audio Warning Buzzer (if Equipped)3 - Oil Pressure4 - Water Temperature5 - Battery Meter6 - Ignition Switch7 - Trim Indicator8 - To 12 Volt Source (PURPLE wire connection)9 - 20 Ampere Fuse


Dual Station Wiring (Using a Neutral Safety Switch in Only One RemoteControl)

72940

BRN/WHT

PUR

GRY

BLK

YE

L/R

ED

NOTE 3

PU

R

PU

R

GR

Y

BLK

BLK

LT. B

LU

BLK

PU

R

TAN

PU

R

BLK

RED/PUR

ORN

PUR

PU

R

GR

Y BLK

BLK

PU

R

LT. B

LU

BLK

PU

R

TAN

OR

N

RE

D/P

UR

PU

R

BLK NOTE 2

NOTE 3

NOTE 1

YEL/RED

YE

L/R

ED

NOTE 3

NOTE 3BRN/WHTNOTE 1

YEL/RED

YEL/RED

YEL/RED

BS I

SEND SEND SEND

LT

LT

LT

LT

SW

12V12V 12V 12V

GND

UNSW

SIG

GND GND GND

SEND SEND SEND

LT

LT

LT

LT

SW

12V12V 12V 12V

GND

UNSW

SIG

GND GND GND

3 4 51 2

A

B

1 2 3 4 5

6

7

NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with Mer-Cruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruiserInboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes)NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the primarystation and secondary station MUST NOT exceed 35 amperes.NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection andslide rubber sleeve over connection.

A - Secondary Station1 - Stop -Start Panel2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter

B - Primary Station1 - Ignition Switch2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter6 - To Engine7 - 20 Ampere Fuse


Dual Station Wiring (Using A Neutral Safety Switch In Both Remote Controls)

72941

BRN/WHT

PUR

GRY

BLK

YE

L/R

ED

NOTE 3

PU

R

PU

R

GR

Y

BLK

BLK

LT. B

LU

BLK

PU

R

TAN

PU

R

BLK

RED/PUR

ORN

PUR

PU

R

GR

Y

BLK B

LK

PU

R

LT. B

LU

BLK

PU

R

TAN

OR

N

RE

D/P

UR

PU

R

BLK

NOTE 2

NOTE 3

NOTE 1

YEL/RED

YE

L/R

ED

NOTE 3 BRN/WHTNOTE 1

YEL/RED

YEL/RED

YEL/RED NOTE 3

NOTE 3

YE

L/R

ED

SEND SEND SEND

LT

LT

LT

LT

SW

12V12V 12V 12V

GND

UNSW

SIG

GND GND GND

BS

I

SEND SEND SEND

LT

LT

LT

LT

SW

12V12V 12V 12V

GND

UNSW

SIG

GND GND GND

3 4 51 2

1 2 3 4 5

7

6

YEL/RED

A

B

NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with Mer-Cruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruiserInboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes)NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the primarystation and secondary station MUST NOT exceed 35 amperes.NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection andslide rubber sleeve over connection.

A - Secondary Station1 - Stop -Start Panel2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter



Dual Station Wiring (Using a Neutral Safety Switch in Engine Wiring Harness)

72942

BRN/WHT

PUR

GRY

BLK

YE

L/R

ED

NOTE 3

PU

R

PU

R

GR

Y

BLK

BLK

LT. B

LU

BLK

PU

R

TAN

PU

R

BLK

RED/PUR

ORN

PUR PU

R

GR

Y

BLK

BLK

PU

R

LT. B

LU

BLK

PU

R

TAN

OR

N

RE

D/P

UR

PU

R

BLK NOTE 2

NOTE 3

NOTE 1

YEL/RED

YE

L/R

ED

NOTE 3

NOTE 3BRN/WHTNOTE 1 YEL/RED

YEL/RED

SEND SEND SEND

LT

LT

LT

LT

SW

12V12V 12V 12V

GND

UNSW

SIG

GND GND GND

BS

I

SEND SEND SEND

LT

LT

LT

LT

SW

12V12V 12V 12V

GND

UNSW

SIG

GND GND GND

3 4 51 2

1 2 3 4 5

7

6

A

B

NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with Mer-Cruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruiserInboard, BROWN/WHITE wire is taped back at engine end, or it may be used for an accessory (limit 5 amperes)NOTE 2 : An accessory fuse panel may be connected at this location. The combined current draw of the primarystation and secondary station MUST NOT exceed 35 amperes.NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection andslide rubber sleeve over connection.A - Secondary Station1 - Stop -Start Panel2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter


467 DK BLU

15A

15A

IDLE AIRCONTROL(IAC) VALVE

916 YEL J1-5 MASTER/SLAVE

461 ORN/BLK

TO ECM/BATFUSE15A

440 ORN

441 BLU/WHT

442 BLU/BLK

443 GRN/WHT444 GRN/BLK

10A

MALFUNCTION INDICATOR LAMP

DK GRN

DLC

R

BLK

INJECTOR

INJECTOR

916 YELBLK

8786853087a


EFI Wiring Diagram (Chart 1 Of 4)

(TP)

ENGINE COOLANTTEMPERATURE (ECT) ENGINE COOLANT

TEMPERATURE (ECT)SENSOR SIGNAL

A

B

C



EST MODULE

ELECTRONIC SPARK TIMING (EST)

DIST. REFERENCE “HIGH”

B A

BYPASS

DIST. REFERENCE “LOW”

TO BUZZER

TO IGN

TO AUDIO WARNINGSWITCHES

TO TACH

TAN/BLU

BLU/TAN

PUR

GRY

3 PNK

121TAN

121WHT

931BRN

COOLANT OVER-TEMP (TO BUZZER)

LOW OIL PRESSURE/LOWI/O FLUID (TO BUZZER)

J1-6 TO LOW OIL PRESSURE ANDGEAR LUBE SWITCH

D

C

B

A

IGNITION CONTROL

IC MODULE

86

430 PUR/WHT



86

85

87

ECM BAT FUSE/DLC 15A

TO IGN COIL TERM B

TO FUEL PUMP RELAY FUSE 15A

TO INJECTORS

10A

SYSTEM/IGNITION RELAY

TO DLC CONNECTOR

KNOCKSENSOR (KS)MODULE

KNOCKSENSOR (KS)

439 PNK/BLK



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ELECTRICAL SYSTEMS - Brunswick Marine in...

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