Engine Controls Connector End Views. GMC Truck GMC C-Series Medium Duty Truck B7 1998

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC C-Series Medium Duty Truck B7 🢒 Brakes 🢒 Air Antilock Brake System 🢒 Engine Controls Connector End Views

Table 1:	Air Intake Heater (C127)
Table 2:	Automatic Transmission (AT) Modulator
Table 3:	Automatic Engine Shutdown Engine Coolant Temperature Switch
Table 4:	Automatic Transmission Modulator Shift Relay
Table 5:	Clutch Pedal Position (CPP) Switch
Table 6:	Cruise Control Switch
Table 7:	Cruise Control Clutch Switch
Table 8:	Data Link Connector (DLC)
Table 9:	Engine Coolant Temperature Switch
Table 10:	Engine Coolant Temperature (ECT) Gauge Sensor
Table 11:	Engine Oil Pressure Gauge Sensor
Table 12:	Engine Oil Pressure Indicator Switch
Table 13:	Ether Injector-Engine Coolant Temperature (ECT) Switch
Table 14:	Exhaust Brake Switch
Table 15:	Exhaust Brake Air interlock Relay (ABS Air)
Table 16:	Exhaust Brake Solenoid Valve
Table 17:	Fuel Sender
Table 18:	Fuel Heater
Table 19:	Hi Idle Switch
Table 20:	Low Engine Coolant Level Indicator Switch
Table 21:	Multifunction Alarm Module (MFAM) C1
Table 22:	Multifunction Alarm Module (MFAM) C2 w/ Auto Engine Shutdown
Table 23:	Powertrain Control Module (PCM) (Cat® Diesel)
Table 24:	Speedo Adapter
Table 25:	Stoplamps Switch C1
Table 26:	Stoplamps Switch C2
Table 27:	Stop Lamps Switch Interface Module
Table 28:	Vehicle Speed Sensor (VSS) (Manual)
Table 29:	Vehicle Speed Sensor (VSS) (Automatic)

Air Intake Heater (C127)

Connector Part Information

•

12052647

•	2 Way M Metri-Pack 150 Series, Sealed (BLK)

Wire Color

Circuit No.

Function

LT BLU

1998

Intake Air Heater Lamp Output

PNK

639

Fuse Output-Ignition

Automatic Transmission (AT) Modulator

Connector Part Information

•

15300027

•	2 Way F Metri-Pack 280 Series, Sealed (BLK)

Wire Color

Circuit No.

Function

BRN

323

Shift Solenoid Feed

BLK

150

Ground

Automatic Engine Shutdown Engine Coolant Temperature Switch

Connector Part Information

•

12052644

•	2 Way F Metri-Pack 150 Series, Sealed (GRY)

Wire Color

Circuit No.

Function

ORN/BLK

535

Coolant Temperature Switch Output

BLK

Not Used

Automatic Transmission Modulator Shift Relay

Connector Part Information

•

12110539

•	5 Way F Metri-Pack 280 Series, Sealed (BLK)

Wire Color

Circuit No.

Function

PNK

Fuse Output Ignition 1 Type III Fuse

BLK

324

Shift Relay Output Coil

GRY

650

Ground

BRN

323

Shift Solenoid Feed

87A

Not Used

Clutch Pedal Position (CPP) Switch

Connector Part Information

•

12052832

•	2 Way F Metri-Pack 150 Series (BLK)

Wire Color

Circuit No.

Function

BRN/WHT

379

Cruise Control Clutch Pedal Switch Output

BLK

808

Sensor Return

Cruise Control Switch

Connector Part Information

•

12020651

•	4 Way F Edgeboard Series ECM (BLK)

Wire Color

Circuit No.

Function

BLK

808

Sensor Return

GRY

397

Cruise Control On Switch Output

GRY/BLK

Cruise Control Resume/ Accel Switch Signal

DK BLU

Cruise Control Set Coast Switch Signal

Cruise Control Clutch Switch

Connector Part Information

•

12064870

•	2 Way M (BLU)

Wire Color

Circuit No.

Function

BRN/WHT

379

Cruise Control Clutch Pedal Switch Output

BLK

808

Sensor Return

Data Link Connector (DLC)

Connector Part Information

•

12110250

•	16 Way F Metri-Pack 150 Series (BLK)

Wire Color

Circuit No.

Function

1-3

Not Used

BLK

150

Ground

BLK/WHT

451

Engine Control Module Ground

WHT/BLK

448

Input +13V Diagnostic Enable Signal Powertrain

TAN/BLK

1921

Serial Data Link-A-SAE 1708

8-12

Not Used

13-14

Not Used

WHT/BLK

1922

Serial Data Link-B-SAE 1708

ORN

140

Fuse Output Battery Type III Fuse

Engine Coolant Temperature Switch

Connector Part Information

•

12052641

•	2 Way F Metri-Pack 150 Series, Sealed (BLK)

Wire Color

Circuit No.

Function

BRN

1675

Check Gauges Signal

Not Used

Engine Coolant Temperature (ECT) Gauge Sensor

Connector Part Information

•

12162198

•	2 Way F Metri-Pack 150 Series, Sealed (GRY)

Wire Color

Circuit No.

Function

DK GRN/WHT

135

Coolant Temperature Sensor Signal

BLK

150

Ground

Engine Oil Pressure Gauge Sensor

Connector Part Information

•

12065400

•	2 Way F Metri-Pack 150 Series, Sealed (LT GRN)

Wire Color

Circuit No.

Function

TAN/WHT

331

Oil Pressure Sensor Signal

BLK

150

Ground

Engine Oil Pressure Indicator Switch

Connector Part Information

•

12065299

•	1 Way F Metri-Pack 150 Series, Sealed (GRY)

Wire Color

Circuit No.

Function

TAN/BLK

231

Oil Pressure Switch Signal

Ether Injector-Engine Coolant Temperature (ECT) Switch

Connector Part Information

•

12010973

•	2 Way M Weather Pack (BLK)

Wire Color

Circuit No.

Function

LT GRN

Engine Metal Temperture Sensor Signal

BLK

150

Ground

Exhaust Brake Switch

Connector Part Information

•

12041492

•	5 Way F Metri-Pack 280 Series. (BLK)

Wire Color

Circuit No.

Function

BLK/WHT

1962

Engine Brake Solenoid Feed

BLK

150

Ground

Not Used

WHT

1961

Engine Brake Switch Output

BLK/WHT

1962

Engine Brake Solenoid Feed

Exhaust Brake Air interlock Relay (ABS Air)

Connector Part Information

•

12110539

•	5 Way F Metri-Pack 280 Series, Flexlock, Sealed (BLK)

Wire Color

Circuit No.

Function

PPL

1146

Engine Brake Enable Signal

PPL

1146

Engine Brake Enable Signal

PNK

1905

Retarder Disable Output

Not Used

87A

BLK/WHT

1962

Engine Brake Solenoid Feed

Exhaust Brake Solenoid Valve

Connector Part Information

•

15300027

•	2 Way F Metri-Pack 280 Series (BLK)

Wire Color

Circuit No.

Function

BLK/WHT

1962

Engine Brake Solenoid Feed

BLK

150

Ground

Fuel Sender

Connector Part Information

•

12162188

•	4 Way F Metri-Pack 150.2 Series, Sealed, (BLK)

Wire Color

Circuit No.

Function

BLK

150

Ground

B-C

Not Used

PPL

Fuel Gauge Sensor Signal

Fuel Heater

Connector Part Information

•

15300027

•	2 Way F Metri-Pack 280 Series, Sealed (BLK)

Wire Color

Circuit No.

Function

BRN

641

Fuse Output Ignition 3 Type III Fuse

BLK

150

Ground

Hi Idle Switch

Connector Part Information

•

12052833

•	2 Way M Metri-Pack 150 Series (BLK)

Wire Color

Circuit No.

Function

BLK

808

Sensor Return

DK GRN

534

High Idle Switch Output

Low Engine Coolant Level Indicator Switch

Connector Part Information

•

12052641

•	2 Way F Metri-Pack 150 Series, Sealed (BLK)

Wire Color

Circuit No.

Function

LT GRN

1478

Low Coolant Sensor Signal

BLK

150

Ground

Multifunction Alarm Module (MFAM) C1

Connector Part Information

•

12084944

•	16 Way F Micro-Pack 100 Series (BLK)

Wire Color

Circuit No.

Function

LT BLU/BLK

1928

Brake Booster Fluid Flow Switch Feed (HYD)

YEL

Fuse Output-Generator-Tachometer Pulse

LT BLU

Stop Lamp Feed (HYD)

ORN/BLK

434

Transmission Mounted Neutral Safety Switch Signal

PNK

Fuse Output-Ignition

TAN/WHT

Brake Warning Indicator Lamp Output

TAN/BLK

231

Oil Pressure Switch Signal

BLK

150

Ground

LT GRN

1478

Low Coolant Sensor Signal

YEL/BLK

Low Coolant Level Indicator Lamp Output

YEL/BLK

1471

Brake Warning Indicator Lamp Feed-Seconday (HYD)

GRY

847

Brake Pedal Switch Output-Extended Travel (HYD)

TAN/WHT

Brake Warning Indicator Lamp Output

BRN

1675

Check Gauges Signal

LT BLU

1377

Check Gauges Indicator Lamp Output

ORN

1740

Fuse Output-Battery (HYD)

Multifunction Alarm Module (MFAM) C2 w/ Auto Engine Shutdown

Connector Part Information

•

12064760

•	4 Way F Metri-Pack 150, Series (BLK)

Wire Color

Circuit No.

Function

BLK

850

Ground

BLK

150

Ground

Not Used

GRY

535

Coolant Temperature Switch Output

Powertrain Control Module (PCM) (Cat® Diesel)

Connector Part Information

•

12186584

•	70 Way F Connector Assembly, Sealed (BLK)

Wire Color

Circuit No.

Function

1-3

Not Used

LT GRN/BLK

431

Reference Voltage Feed-8 Volt Reference

BLK

808

Sensor Return

6-7

Not Used

TAN/BLK

1921

Serial Data Link-A-SAE-1708

WHT/BLK

1922

Serial Data Link-B-SAE-1708

10-11

Not Used

WHT

1961

Engine Brake Switch Output

13-19

Not Used

GRA

324

Shift Relay Output-Coil

Not Used

BRN/WHT

379

Cruise Control Clutch Pedal Switch Output

23-27

Not Used

BRN/WHT

419

Check Engine Indicator Lamp Output

29-30

Not Used

RED

2013

High Idle Indicator Lamp Output

YEL

400

Vehicle Speed Sensor Signal

33-34

Not Used

DK BLU

Cruise Control Set/Coast Switch Signal

36-39

Not Used

DK GRN

534

High Idle Switch Output

41-43

Not Used

GRA/BLK

Cruise Control Resume/Accel Switch Siignal

TAN

848

Brake Pedal Switch Signal-ABS

WHT/BLK

448

Diagnostic Enable Signal-Powertrain

47-51

Not Used

ORN

840

Fuse Output-Battery

ORN

840

Fuse Output-Battery

54-58

Not Used

GRA

397

Cruise Control On Switch Output

60-61

Not Used

ORN/BLK

1786

Transmission Park/Neutral Signal

Not Used

LT BLU

Stop Lamp Feed

BLK/WHT

451

Engine Control Module Ground

DKBLU

417

+5V Accelerator Pedal Position

BLK/WHT

451

Engine Control Module Ground

68-69

Not Used

PNK

139

Fuse Output-Ignition

Speedo Adapter

Connector Part Information

•

12084945

•	16 Way F Micro-Pack 100, Series (GRY)

Wire Color

Circuit No.

Function

GRY/BLK

1467

Two Speed Rear Axle Shift Motor Relay Output Coil

A2-A8

Not Used

PNK

Fuse Output Ignition 1 Type III Fuse

PPL/WHT

821

Vehicle Speed Sensor Signal

LT GRN/BLK

822

Vehicle Speed Sensor Return

Not Used

BLK/WHT

451

Engine Control Module Ground

Not Used

YEL

400

Vehicle Speed Sensor Signal

DK GRN

389

Vehicle Speed Signal -4000 Pulses Per Mile

Stoplamps Switch C1

Connector Part Information

•

12033704

•	4 Way F Metri-Pack 280 Series (BLK)

Wire Color

Circuit No.

Function

ORN

640

Fuse Output Battery Type III Fuse

LT BLU

Stop Lamp Feed

ORN

540

Fuse Output Battery Type III Fuse

GRY

847

Brake Pedal Switch Output Extended Travel

Stoplamps Switch C2

Connector Part Information

•

12033709

•	2 Way F Metri-Pack 280 Series (BLK)

Wire Color

Circuit No.

Function

BLK

808

Sensor Return

TAN

848

Brake Pedal Switch Signal ABS

Stop Lamps Switch Interface Module

Connector Part Information

•

12004706

•	6 Way F Printed Circuit Edgeboard Series Standard (BLK)

Wire Color

Circuit No.

Function

PNK

Fuse Output-Ignition

PNK

139

Fuse Output-Ignition

BLK

850

Ground

D-F

Not Used

Vehicle Speed Sensor (VSS) (Manual)

Connector Part Information

•

12162194

•	2 Way F Metri-Pack 150 Series, Sealed (BLK)

Wire Color

Circuit No.

Function

PPL/WHT

821

Vehicle Speed Sensor Signal

LT GRN

822

Vehicle Speed Sensor Return

Vehicle Speed Sensor (VSS) (Automatic)

Connector Part Information

•

12052644

•	2 Way F Metri-Pack 150 Series, Sealed (GRY)

Wire Color

Circuit No.

Function

PPL/WHT

821

Vehicle Speed Sensor Signal

LT GRN/BLK

822

Vehicle Speed Sensor Return