GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 GMC C-Series Medium Duty Truck B7 🢒 Engine 🢒 Engine Controls - 7.4L 🢒 Lighting Systems Connector End Views
Table 1: Automatic Transmission (A/T) Shift Control
Table 2: Backup Lamps Switch (Automatic)
Table 3: Backup Lamps Switch (Manual)
Table 4: Daytime Running Lights Control Module
Table 5: Daytime Running Lights (DRL) Diode
Table 6: HAZARD Name Plate
Table 7: Hazard Warning Switch
Table 8: Headlamps Dimmer Switch
Table 9: Headlamps Switch
Table 10: Headlamp High/Low Beam (Typical)
Table 11: IP Lamps Dimmer Switch
Table 12: LOW AIR Pressure Indicator Lamp
Table 13: Multifunction Switch
Table 14: Neutral Switch C1
Table 15: Neutral Switch C2
Table 16: Park And Turn Signal Lamp, Left Front
Table 17: Park And Turn Signal Lamp, Right Front
Table 18: Park Brake Indicator Switch (JE5)
Table 19: Stoplamps Switch C1
Table 20: Stoplamps Switch C2

Automatic Transmission (A/T) Shift Control


Object Number: 62463 Size: CH

Connector Part Information
    • 12064766
    • 8 Way F Metri-Pack 150 Series (BLU)

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Instrument Panel Lamp Feed

B

ORN/BLK

1786

Transmission Park/Neutral Signal

C-E

--

--

Not Used

F

PNK

39

Ignition 1 Voltage

G

--

--

Not Used

H

BLK

250

Ground

Backup Lamps Switch (Automatic)


Object Number: 35437 Size: CH

Connector Part Information
    • 12052641
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

BRN

41

Ignition 3 Voltage

B

LT GRN

24

Backup Lamp Feed

Backup Lamps Switch (Manual)


Object Number: 35437 Size: CH

Connector Part Information
    • 12052644
    • 2 Way F Metri-Pack 150 Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A

BRN

41

Ignition 3 Voltage

B

LT GRN

24

Backup Lamp Feed

Daytime Running Lights Control Module


Object Number: 222648 Size: CH

Connector Part Information
    • 12191131
    • 8 Way P/C Edgeboard Standard (GRY)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

1134

Park Brake Switch Signal

B

--

--

Not Used

C

PNK

39

Ignition 1 Voltage

D

YEL

10

Headlamp Switch Output

E-F

--

--

Not Used

G

LT GRN/BLK

592

Daytime Running Lamp Relay Output Coil

H

BLK

250

Ground

Daytime Running Lights (DRL) Diode


Object Number: 35456 Size: CH

Connector Part Information
    • 12064749
    • 2 Way F Metri-Pack 480 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

YEL

634

Daytime Running Lamp Diode Feed

B

WHT

815

Daytime Running Lamp Diode Output

HAZARD Name Plate


Object Number: 35441 Size: CH

Connector Part Information
    • 12047663
    • 2 Way M Metri-Pack 150 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B

GRY

8

Instrument Panel Lamp Feed

Hazard Warning Switch


Object Number: 288397 Size: CH

Connector Part Information
    • 12034482
    • 6 Way F Metri-Pack 280 Series (GRY)

Pin

Wire Color

Circuit No.

Function

A

BRN

27

Hazard Lamps Flasher Output

B

YEL

18

Stop/Turn Lamp Feed Left Rear

C

DK BLU

15

Turn Signal Lamp Feed Right Front

D

DK GRN

19

Stop/Turn Lamp Feed Right Rear

E

LT BLU

14

Turn Signal Lamp Feed Left Front

F

BLK

150

Ground

Headlamps Dimmer Switch


Object Number: 332023 Size: CH

Connector Part Information
    • 08917693
    • 4 Way F 56 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

11

High Beam Headlamp Feed

B

--

--

Not Used

C

PPL

544

Daytime Running Lamp Relay Feed N.C. Contact

D

YEL

10

Headlamp Switch Output

Headlamps Switch


Object Number: 39734 Size: CH

Connector Part Information
    • 12034061
    • 6 Way F Metri-Pack 480 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

13

Headlamp Switch Output Park Lamps

B

YEL

634

Daytime Running Lamp Diode Feed

C

RED

742

Battery Positive Voltage

D

YEL

10

Headlamp Switch Output

E

ORN

1040

Battery Positive Voltage

F

--

--

Not Used

Headlamp High/Low Beam (Typical)


Object Number: 306269 Size: CH

Connector Part Information
    • 12034372
    • 3 Way F Metri-Pack 800 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK

150

Ground

B

LT GRN

11

High Beam Headlamp Feed

C

TAN

12

Low Beam Headlamp Feed

IP Lamps Dimmer Switch


Object Number: 38618 Size: CH

Connector Part Information
    • 12034060
    • 4 Way F Metri-Pack 480 Series (NAT)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

13

Headlamp Switch Output Park Lamps

B-C

--

--

Not Used

D

GRY

8

Instrument Panel Lamp Feed

LOW AIR Pressure Indicator Lamp


Object Number: 309447 Size: CH

Connector Part Information
    • 12004264
    • Bulb Base Type W-2, Axial

Pin

Wire Color

Circuit No.

Function

A

GRY

8

Instrument Panel Lamp Feed

B

BLK

150

Ground

Multifunction Switch


Object Number: 222621 Size: CH

Connector Part Information
    • 12004147
    • 11 Way F Pack-Con Series 1 (BLK)

Pin

Wire Color

Circuit No.

Function

D-F

--

--

Not Used

G

BLK

28

Horn Relay Output Coil

H

LT BLU

14

Turn Signal Lamp Feed Left Front

J

DK BLU

15

Turn Signal Lamp Feed Right Front

K

--

--

Not Used

L

PPL

16

Turn Signal Flasher Output

M

YEL

18

Stop/Turn Lamp Feed Left Rear

N

DK GRN

19

Stop/Turn Lamp Feed Right Rear

P

--

--

Not Used

Neutral Switch C1


Object Number: 535900 Size: CH

Connector Part Information
    • 12129840
    • 7 Way F Metri-Pack Mixed Series, Sealed (GRY)

Pin

Wire Color

Circuit No.

Function

A-B

--

--

Not Used

C

BRN

41

B/U Circuit Breaker Feed

D

BLK

2762

Transmission Fluid Temperature Sensor Return

E

PPL

806

Crank Voltage

F

LT GRN

24

Upfitter Connector To Backup Lamp Feed

G

ORN/BLK

434

Transmission Mounted Neutral Safety Switch Signal

Neutral Switch C2


Object Number: 535904 Size: CH

Connector Part Information
    • 12191757
    • 4 Way F Metri-Pack 150 Series, Sealed (NAT)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

771

Transmission Position Switch Signal-Bit 1

B

GRY

773

Transmission Position Switch Signal-Bit 3

C

WHT

776

Transmission Position Switch Signal-Parity Bit

D

YEL

772

Transmission Position Switch Signal-Bit 2

Park And Turn Signal Lamp, Left Front


Object Number: 73223 Size: CH

Connector Part Information
    • 12162185
    • 3 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

14

Turn Signal Lamp Feed Left Front

B

BLK

150

Ground

C

BRN

9

Park Lamp Feed

Park And Turn Signal Lamp, Right Front


Object Number: 73223 Size: CH

Connector Part Information
    • 12162185
    • 3 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU

15

Turn Signal Lamp Feed Right Front

B

BLK

150

Ground

C

BRN

9

Park Lamp Feed

Park Brake Indicator Switch (JE5)


Object Number: 258230 Size: CH

Connector Part Information
    • 12065298
    • 4 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT BLU

1134

Park Brake Switch Signal

B

BLK

150

Ground

C-D

--

--

Not Used

Stoplamps Switch C1


Object Number: 130679 Size: CH

Connector Part Information
    • 12033704
    • 4 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

ORN

640

Battery Positive Voltage

B

LT BLU

20

Stoplamp Feed

C

ORN

540

Battery Positive Voltage

D

GRY

847

Brake Pedal Switch Output Extended Travel

Stoplamps Switch C2


Object Number: 333038 Size: CH

Connector Part Information
    • 12033709
    • 2 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

451

Engine Control Module Ground

A

BLK

808

Sensor Return (Diesel)

B

TAN

848

Brake Pedal Switch Signal-ABS