Merc Elecs

7/28/2019 Merc Elecs

1/32


2/324F-0 - WIRING DIAGRAMS 90-823224--2 796

Table of ContentsPage

Wiring Colors for MerCruiser 4F-1. . . . . . . . . . . . . . .Engine 4F-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

MCM (Stern Drive) 4F-2. . . . . . . . . . . . . . . . . . . . .MIE (Inboard) Models 4F-10. . . . . . . . . . . . . . . . .

Quicksilver Instrumentation 4F-13. . . . . . . . . . . . . . .MCM (Stern Drive) 4F-13. . . . . . . . . . . . . . . . . . . .MIE (Inboard) 4F-16. . . . . . . . . . . . . . . . . . . . . . . .Dual Station Wiring (Using a Neutral SafetySwitch in Only One Remote Control) 4F-18. . . .Dual Station Wiring (Using A Neutral SafetySwitch In Both Remote Controls) 4F-19. . . . . . .Dual Station Wiring (Using a Neutral SafetySwitch in Engine Wiring Harness) 4F-20. . . . . . .Multi-Port Injection Wiring Diagram(Chart 1 Of 4) 4F-21. . . . . . . . . . . . . . . . . . . . . . . .

Multi-Port Injection Wiring Diagram(Chart 2 Of 4) 4F-22. . . . . . . . . . . . . . . . . . . . . . . .



Throttle Body Injection Wiring Diagram(Chart 1 Of 4) 4F-25. . . . . . . . . . . . . . . . . . . . . . . .




Index


3/32WIRING DIAGRAMS - 4F90-823224--2 796

Wiring Colors for MerCruiser

NOTE: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

Index



Engine

MCM (Stern Drive)

THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON EXHAUST ELBOW

50844

2

3

1

1

2

3

4

5

6

12

3

1

2

3 3

A - Ignition And Choke System

1 - Distributor2 - Ignition Module3 - Ignition Coil

B - Starting And Charging System

1 - Alternator2 - Ground Stud3 - Battery4 - Starter Motor5 - Circuit Breaker6 - Starter Slave Solenoid

C - Audio Warning System

1 - Oil Pressure Sender2 - Water Temperature Sender3 - Trim Sender

D - Instrumentation System

1 - Water Temperature2 - Oil Pressure Switch3 - Drive Unit Oil Bottle (Old And New Style)

Index



THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON DISTRIBUTOR

72936

WHT/RED

WHT/GRN

GRY

PUR

1

2

1

2

3

4

5

6

12

3

1

2

3 3

AA

D

B

C


1 - Distributor With Ignition Module2 - Ignition Module3 - Ignition Coil


1 - Alternator2 - Ground Stud3 - Battery4 - Starter Motor5 - Circuit Breaker6 - Starter Slave Solenoid


1 - Oil Pressure Sender2 - Water Temperature Sender3 - Trim Sender



Index



THUNDERBOLT V

73996

A

56

2

1

3

4

1

2

3

4

7

13

1

2

3

A

D

2

B

C

A - Ignition And Choke System1 - Distributor With Ignition Module2 - Timing Lead3 - Knock Sensor4 - Ignition Coil


1 - Alternator2 - Electric Choke3 - Ground Stud4 - Battery5 - Starter Motor6 - Circuit Breaker7 - Starter Slave Solenoid

C - Audio Warning System1 - Oil Pressure Sender2 - Water Temperature Sender3 - Trim Sender



Index



ALL MCM THROTTLE BODY / MULTI-PORT INJECTION STARTING AND CHARGING DIAGRAM

7169

1

2

3

4

5

6

1

2

3

1

22

b

c

a

dAA

B

C

A - Charging And Starting System

1 - Alternator

2 - Ground Stud3 - Starter Motor4 - Battery5 - Circuit Breaker6 - Starter Slave Solenoid

B - Audio Warning System / Power ReductionCircuit (Not Present On 1996 And Newer Models)

1 - Oil Pressure2 - Drive Unit Oil Level Bottle (New And Old Style)

C - Instrumentation System

1 - Oil Pressure Sender

2 - Water Temperature Sender3 - Trim Sender

a - Positive (12V) Power Wire To Furl Injection SystemHarness

b - Harness Connector To Fuel Injection System Harness

c - Auxiliary Tachometer Lead

d - 90 Amp. Fuse (DO NOT Remove)

Index



ALL THROTTLE BODY / MULTI-PORT INJECTION INBOARD AND SKI ENGINES

2

b

c

a

1

3

5

4

6

12

1

2

NOTE 1

d

AA

B

C

NOTE 1: Taped back BROWN and BLACK wire may be used for an accessory. LOAD MUST NOT EXCEED 5AMPS

A - Audio Warning System

1 - Oil Pressure Switch2 - Transmission Fluid Temperature

B - Instrumentation System

1 - Oil Pressure Sender2 - Water Temperature Sender

C - Charging And Starting System

1 - Alternator2 - Ground Stud3 - Starter

4 - Circuit Breaker5 - Starter Slave Solenoid6 - Neutral Safety Switch

a - Positive (12V) Power Wire To Fuel Injection SystemHarness

b - Harness Connector To Fuel Injection System Harness

c - Auxiliary Tachometer Lead

d - 90 Amp. System Fuse

Index



MCM 7.4LX / MIE 7.4L THROTTLE BODY INJECTION

75001

2

3

4

5

6

7

8

9

10

11

1

12

13

14

15

16

17

18

19

NOTE 1

Note: All BLACK Wires With A Ground Symbol Are Interconnected Within The Fuel Injection System Harnes

NOTE 1: As a mid year (96-1/2) model change, the Throttle Body and Multi-Port Injection models have the layard stop connector removed from the wiring harness. The dual engine capability is relocated by routing the YEwire to the Data Link Connector (DLC).

1 - Fuel Pump2 - Throttle Body3 - Distributor4 - Coil5 - Electronic Spark Control (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 (ECT) Sensor12- Electronic Control Module (ECM)13- Fuel Pump Relay14- Ignition/System Relay15- Fuse (15 Amp) Fuel Pump16- Fuse (15 Amp) ECM/DLC/Battery17- Fuse (10 Amp) ECM/Injector/Ignition/Knock Module18- Harness Connector To Starting/Charging Harness19- Positive (+) Power Wire To Engine Circuit Breaker

Index



7.4L / 7.4LX / 454 / 502 MULTI-PORT MAGNUM ENGINE DIAGRAM MODELS WITH VST

71692

1

2

3

4

5

6

7

8

9

1011

12

13

14

15

16

17

18

19

20

21

22

NOTE 1

NOTE 1: As a mid year (96-1/2) model change, the Throttle Body and Multi Port Injection models have the lan-yard stop connector removed from the wiring harness. The dual engine capability is relocated by routing the YELwire to the Data Link Connector (DLC).

NOTE 2: All BLACK wires with a ground symbol are interconnected within the fuel injection system harness.

1 - Vapor Separator Tank2 - Throttle Body3 - Distributor4 - Coil5 - Knock Sensor (KS) Module6 - Data Link Connector (DLC)7 - Manifold Absolute Pressure (MAP) Sensor8 - Intake Air Temperature (IAT) Sensor9 - Knock Sensor (KS)10- Idle Air Control (IAC)11- Throttle Positive Sensor (TP)

12- Engine Coolant Temperature (ECT) Sensor13- Electronic Control Module (ECM) Sensor14- Fuel Pump Relay15- Ignition Relay16- Fuel Pump Relay (15 Amp)17- Injector Fuse 15 Amp.) ECM, DLC, Battery18- ECM Fuse (10 Amp.) ECM, Ignition, Injectors, Knock Sen-

sor Module19- Harness Connector To Starting / Charging Harness20- Harness Connector To Lanyard Stop Switch (Optional)21- Harness Connector For Dual Engine Data Link Cable22- Positive (+) Power Wire To Engine Circuit Breaker

Index



7.4L / 7.4LX / 454 / 502 MULTI-PORT MAGNUM ENGINE DIAGRAM MODELS WITH COOL FUELSYSTEM

7514

1

2

3

4

5

6

7

8

910

11

12

13

14

15

16

17

18

19

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

1 - Fuel Pump2 - Throttle Body3 - Distributor4 - Coil5 - Electronic Spark Control (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 (ECT) Sensor12- Electronic Control Module (ECM)13- Fuel Pump Relay14- Ignition/System Relay15- Fuse (15 Amp) Fuel Pump16- Fuse (15 Amp) ECM/DLC/Battery17- Fuse (10 Amp) ECM/Injector/Ignition/Knock Module18- Harness Connector To Starting/Charging Harness19- Positive (+) Power Wire To Engine Circuit Breaker

Index



MIE (Inboard) Models

THUNDERBOLT IV WITH IGNITION MODULE MOUNTED ON EXHAUST ELBOW

50773

A

B

C

D

1

2

3

1

2

3

4

5

6

7

1

NOTE2

1

2 3

NOTE:Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMPS.




1 - Alternator2 - Ground Stud3 - Battery4 - Starter Motor5 - Circuit Breaker6 - Neutral Start Safety Switch7 - Starter Slave Solenoid


1 - Water Temperature2 - Oil Pressure3 - Transmission Fluid Temperature



Index


13/32WIRING DIAGRAMS - 4F-190-823224--2 796

THUNDERBOLT IV IGNITION MODULE MOUNTED ON DISTRIBUTOR

72937

WHT/RED

WHT/GRN

GRY

PUR

1

2

3

1

2

3

45

6

7

1

B

D

NOTE

1

2

2

AA C

NOTE:Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMP




1 - Alternator2 - Ground Stud3 - Battery4 - Starter Motor5 - Circuit Breaker6 - Neutral Start Safety Switch7 - Starter Slave Solenoid


1 - Water Temperature2 - Oil Pressure3 - Transmission Fluid Temperature



Index



THUNDERBOLT V

74160

A

B

C

D

NOTE

1

2

3

4

1

2 3

4

5

6

7

8

1

2

3

1

2

NOTE:Taped Back BROWN-WHITE wire may be used for an accessory. LOAD MUST NOT EXCEED 5 AMPS.


1 - Distributor With Ignition Module2 - Timing Lead3 - Knock Sensor4 - Ignition Coil


1 - Alternator2 - Electric Choke3 - Ground Stud4 - Battery5 - Starter Motor6 - Circuit Breaker7 - Starter Slave Solenoid8 - Neutral Start Safety Switch


1 - Water Temperature Sender2 - Oil Pressure Sender3 - Transmission Fluid Temperature


1 - Water Temperature2 - Oil Pressure Switch

Index



Quicksilver Instrumentation

MCM (Stern Drive)

EARLIER STYLE CONTROL AND AUDIO WARNING BUZZER

72938

1

2 3 4 5

6

7

8

NOTES 1 & 2

Refer to gauge manufacturers instructions for specific connections.

NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubbsleeve over connection.

NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 35-4amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) haness wire connected to it.

1 - Audio Warning Buzzer (If So Equipped)2 - Tachometer3 - Oil Pressure4 - Water Temperature

5 - Battery Meter6 - Ignition Switch7 - Trim Indicator8 - 20 Amp. Fuse

Index



454/502 MAGNUM MULTI-PORT INJECTION WITH EARLIER STYLE CONTROLS AND AUDIOWARNING BUZZER

71695

1

23 4 5

6 78

NOTES 1 & 2


NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubbersleeve over connection.

NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 40amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) har-ness wire connected to it.

1 - Audio Warning Buzzer (If Equipped)2 - Tachometer3 - Oil Pressure4 - Water Temperature


Index



LATER STYLE CONTROLS AND AUDIO WARNING BUZZER

NOTE 1

NOTE 1

NOTE 1

NOTE 2

74046

1

23 4 5

67

8


NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubbsleeve over connection.

NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 4amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) haness wire connected to it.

1 - Audio Warning Buzzer (If Equipped)2 - Tachometer3 - Oil Pressure4 - Water Temperature


Index



MIE (Inboard)

EARLIER STYLE AUDIO WARNING BUZZER

72939

BS

I

1

23 4 5

6 7


NOTE 1: Connect wires together with screw and hex nut. Apply Liquid Neoprene to connection and slide rubbersleeve over connection.

NOTE 2: Power for a fused accessory panel may be taken from this connection. Load MUST NOT exceed 40amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLACK (Ground) har-ness wire connected to it.


5 - Battery Meter6 - Ignition Switch7 - 20 Amp. Fuse

Index



LATER STYLE AUDIO WARNING BUZZER

74274

B

SI

1

2

3 4 5

6

8

7


NOTE 1: Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection anslide rubber sleeve over connection.

NOTE 2: Power for a second fused accessory panel may be taken from this connection. Load MUST NOT eceed 35-40 amps. Panel ground wire MUST BE connected to instrument terminal that has an 8 gauge BLAC(ground) harness wire connected to it.


5 - Battery Meter6 - Ignition Switch7 - To 12 Volt Source (PURPLE Wire Connection)8 - 20 Amp. Fuse

Index



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

72940

BRN/WHT

PUR

GRY

BLK

YEL/RED

NOTE 3

PUR

PUR

GRY

BLK

BLK

LT.BLU

BLK

PUR

TAN

PUR

BLK

RED/PUR

PURPUR

GRY B

LK

BLK

PUR

LT.BLU

BLK

PUR

TAN

RED/PUR

PUR

BLK NOTE 2

NOTE 3

NOTE 1

YEL/RED

YEL/RED

NOTE 3

NOTE 3

BRN/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

34 51

2

A

B

1 2 3 4 5

6

7

RED/PUR

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 primary

station 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.

B - Secondary Station

1 - Start - Stop Panel2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter

B - Primary Station

1 - Ignition Switch2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter

Index



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

729

BRN/WHT

PUR

GRY

BLK

YEL/RED

NOTE 3

PUR

PUR

GRY

BLK

BLK

LT.BLU

BLK

PUR

TAN

PUR

BLK

RED/PUR

ORN

PURPUR

GRY

BLK

BLK

PUR

LT.BLU

BLK

PUR

TAN

RED/PUR

PUR

BLK NOTE 2

NOTE 3

NOTE 1

YEL/RED

YEL/RED

NOTE 3 BRN/WHTNOTE 1

YEL/RED

YEL/RED

YEL/REDNOTE 3

NOTE 3

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

12

3 4 5

7

6

YEL/RED

A

B

RED/PUR

NOTE 1: BROWN/WHITE wire is taped back at instrument end. If installing on boat that is equipped with MeCruiser stern drive, BROWN/WHITE wire is connected to trim sender terminal block. If installing on MerCruisInboard, 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 prima

station and secondary station MUST NOT exceed 35 amperes.NOTE 3 : Connect wires together with screw and hex nut. Apply Quicksilver Liquid Neoprene to connection anslide rubber sleeve over connection.

A - Secondary Station


B - Primary Station

1 - Ignition Switch2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter6 - To Engine7 - 20 Ampere Fuse

Index



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

72942

BRN/WHT

PUR

GRY

BLK

YEL/RED

NOTE 3

PUR

PUR

GRY

BLK

BLK

LT.BLU

BLK

PUR

TAN

PUR

BLK

RED/PUR

PUR PUR

GRY

BLK

BLK

PUR

LT.BLU

BLK

PUR

TAN

RED/PUR

PUR

BLK NOTE 2

NOTE 3

NOTE 1

YEL/RED

YEL/RED

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

12

3 4 5

7

6

A

B

RED/PUR

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 primary

station 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 Station


B - Primary Station

1 - Ignition Switch2 - Tachometer3 - Oil Pressure4 - Water Temperature5 - Battery Meter6 - To Engine7 - 20 Ampere Fuse

Index


23/32

INJECTORS 2, 3, 5, 8

INJECTORS 1, 4, 6, 7

467 DK BLU

15A

15A

87a 30 85 86 87

IDLE AIRCONTROL(IAC) VALVE

C

B

A

DUAL ENGINE DATA LINK(MULTIPLE ENGINEAPPLICATION SOME MODELS)

BLK

916 YEL J1-5 MASTER/SLAVE

461 ORN/BLK

TO ECM/BATFUSE15A

440 ORN

441 BLU/WHT442 BLU/BLK

443 GRN/WHT

444 GRN/BLK

10A

MALFUNCTION INDICATOR LAM

DK GRN

DLC

R

BLK

PORT FUEL JUMPER ISCONNECTED ONLY IN MPI

APPLICATIONS

SOME MODELSWILL HAVE THEDUAL ENGINEDATA LINKMOVED TO THEDLC

916 YELBLK

WIRING DIAGRAMS - 4F-290-823224--2 796

Multi-Port Injection Wiring Diagram (Chart 1 Of 4)

Index


24/32

(TP)

ENGINE COOLANTTEMPERATURE

(ECT) ENGINE COOL-ANTTEMPERATURE(ECT) SENSORSIGNAL

INTAKE AIRTEMPERATURE

(IAT)

INTAKE AIR TEMPERATURE(IAT) SENSOR SIGNAL

(THIS SENSOR IS NOT ON5.7L / 350 CID ENGINES)

A

B

C

4F-22 - WIRING DIAGRAMS 90-823224--2 796


Index


25/32

EST MODULE

ELECTRONIC SPARK TIMING (EST)

DIST. REFERENCE HIGH

B A

BYPASS

DIST. REFERENCE LOW

TO BUZZER

TO IGN

TO AUDIOWARNINGSWITCHES

TO TACH

TAN/BLU

BLU/TAN

PUR

GRY

3 PNK

121TAN

121

WHT

931BRN

COOLANT OVERTEMP(TO BUZZER)

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

J1-6 TO LOW OIL PRESSURE ANDGEAR LUBE SWITCHES ORTRANS. TEMPERATURE

D

C

B

A

IGNITION CONTROL

IC MODULE

86

430 PUR/WHT

BRN



Index


26/32

86

85

87

ECM BAT FUSE/DLC 15A

TO IGN COIL TERM B

TO FUEL PUMP RELAY FUSE 15A

TO INJECTORS

10A

B

A

BLK

LANYARD STOPSWITCH CIRCUIT(OPTIONAL)

SYSTEM/IGNITION RELAY

TO DLC CONNECTOR

KNOCKSENSOR (KS)MODULE

KNOCKSENSOR (KS)

439 PNK/BLK

CONNECTOR NOT PRESENTON SOME MULTI-PORT MODELS



Index


27/32

467 DK BLU

15A

15A

87a 30 85 86 87

IDLE AIRCONTROL(IAC) VALVE

C

B

A

DUAL ENGINE DATA LINK(MULTIPLE ENGINEAPPLICATION SOME MODELS)

BLK

916 YEL J1-5 MASTER/SLAVE

461 ORN/BLK

TO ECM/BATFUSE15A

440 ORN

441 BLU/WHT442 BLU/BLK

443 GRN/WHT

444 GRN/BLK

10A

MALFUNCTION INDICATOR LAM

DK GRN

DLC

R

BLK

SOME MODELSWILL HAVE THEDUAL ENGINEDATA LINKMOVED TO THEDLC

INJECTOR

INJECTOR

916 YELBLK


Throttle Body Injection Wiring Diagram (Chart 1 Of 4)

Index


28/32

(TP)

ENGINE COOL-ANTTEMPERATURE(ECT)

ENGINE COOLANTTEMPERATURE (ECT)SENSOR SIGNAL

A

B

C



Index


29/32

EST MODULE

ELECTRONIC SPARK TIMING (EST)

DIST. REFERENCE HIGH

B A

BYPASS

DIST. REFERENCE LOW

TO BUZZER

TO IGN

TO AUDIOWARNINGSWITCHES

TO TACH

TAN/BLU

BLU/TAN

PUR

GRY

3 PNK

121TAN

121

WHT

931BRN

COOLANT OVER-TEMP (TO BUZZER)

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

J1-6 TO LOW OIL PRESSURE ANDGEAR LUBE SWITCHES ORTRANS. TEMPERATURE

D

C

B

A

IGNITION CONTROL

IC MODULE

86

430 PUR/WHT

BRN



Index


30/32

86

85

87

ECM BAT FUSE/DLC 15A

TO IGN COIL TERM B

TO FUEL PUMP RELAY FUSE 15A

TO INJECTORS

10A

B

A

BLK

LANYARD STOPSWITCH CIRCUIT(OPTIONAL)

SYSTEM/IGNITION RELAY

TO DLC CONNECTOR

KNOCKSENSOR (KS)MODULE

KNOCKSENSOR (KS)

439 PNK/BLK

CONNECTOR NOT PRESENTON SOME EFI MODELS



Index


31/32

THIS PAGE IS INTENTIONALLY BLANK TOALLOW FOR CORRECTIONS OR ADDITIONS

AT A LATER DATE


Index


32/32

THIS PAGE IS INTENTIONALLY BLANK TOALLOW FOR CORRECTIONS OR ADDITIONS

AT A LATER DATE

Merc Elecs

Documents

Transcript of Merc Elecs