GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1999 🢒 GMC C-Series Medium Duty Truck B7 🢒 Brakes 🢒 Hydraulic Brakes 🢒 Air Antilock Brake System Connector End Views
Table 1: Air ABS Relay (Flasher/Relay Center)
Table 2: Brake Pressure Modulator Valve (BPMV) Left Front
Table 3: Brake Pressure Modulator Valve (BPMV) Left Rear
Table 4: Brake Pressure Modulator Valve (BPMV) Right Front
Table 5: Brake Pressure Modulator Valve (BPMV) Right Rear
Table 6: Electronic Brake Control Module (EBCM) C1
Table 7: Electronic Brake Control Module (EBCM) C2
Table 8: Exhaust Brake Solenoid Valve
Table 9: Exhaust Brake Air interlock Relay (ABS Air)
Table 10: Exhaust Brake Switch
Table 11: Park Brake Indicator Switch
Table 12: Wheel Speed Sensor (WSS) Left Front
Table 13: Wheel Speed Sensor (WSS) Left Rear
Table 14: Wheel Speed Sensor (WSS) Right Front
Table 15: Wheel Speed Sensor (WSS) Right Rear

Air ABS Relay (Flasher/Relay Center)


Object Number: 73243 Size: CH

Connector Part Information
    • 12160504
    • 36 Way (BLK)

Pin

Wire Color

Circuit No.

Function

A1-A9

--

--

Not Used

B1-B4

--

--

Not Used

B5

BRN

1941

Fuse Output -Ignition III- Type III Fuse

B6

--

--

Not Used

B7

BRN

341

Fuse Output -Ignition III- Type III Fuse

B8-B9

--

--

Not Used

C1-C4

--

--

Not Used

C5

BLK

150

Ground

C6

--

--

Not Used

C7

LT GRN

147

Fuse Output -Off/Run- Type III Fuse

C8-C9

--

--

Not Used

D1-D9

--

--

Not Used

Brake Pressure Modulator Valve (BPMV) Left Front


Object Number: 38598 Size: CH

Connector Part Information
    • 12040977
    • 3 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK GRN

1900

AAS Modulator Output Exhaust Left Front

B

LT BLU

1902

AAS Modulator Feed Left Front

C

GRY

1901

AAS Modulator Output Hold Left Front

Brake Pressure Modulator Valve (BPMV) Left Rear


Object Number: 38598 Size: CH

Connector Part Information
    • 12040977
    • 3 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

GRY/BLK

1913

AAS Modulator Output Exhaust Left Rear

B

ORN

1915

AAS Modulator Feed Left Rear

C

LT BLU/BLK

1914

AAS Modulator Output Hold Left Rear

Brake Pressure Modulator Valve (BPMV) Right Front


Object Number: 38598 Size: CH

Connector Part Information
    • 12040977
    • 3 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

PPL

1906

AAS Modulator Output Exhaust Right Front

B

TAN

1908

AAS Modulator Feed Right Front

C

YEL

1907

AAS Modulator Output Hold Right Front

Brake Pressure Modulator Valve (BPMV) Right Rear


Object Number: 38598 Size: CH

Connector Part Information
    • 12040977
    • 3 Way F Metri-Pack 280 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/WHT

1918

AAS Modulator Output Exhaust Right Rear

B

PPL

1920

AAS Modulator Feed Right Rear

C

PNK/BLK

1919

AAS Modulator Output Hold Right Rear

Electronic Brake Control Module (EBCM) C1


Object Number: 309412 Size: CH

Connector Part Information
    • 12034398
    • 30 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A1

BLK/WHT

1651

Air Anti Skid System Ground

A2

BLK/WHT

1651

Air Anti Skid System Ground

A3

BLK/WHT

1651

Air Anti Skid System Ground

B1

PNK

1939

Fuse Output Ignition 1 Type III Fuse

B2-B3

--

--

Not Used

C1

TAN

1908

AAS Modulator Feed Right Front

C2-C3

--

--

Not Used

D1

YEL

1907

AAS Modulator Output Hold Right Front

D2-D3

--

--

Not Used

E1

PPL

1906

AAS Modulator Output Exhaust Right Front

E2

--

--

Not Used

E3

DK BLU

1899

Dash Lamp Relay Output Coil

F1

DK GRN

1900

AAS Modulator Output Exhaust Left Front

F2-F3

--

--

Not Used

G1

GRY

1901

AAS Modulator Output Hold Left Front

G2

TAN/BLK

1921

Serial Data Link A SAE 1708

G3

WHT/BLK

1922

Serial Data Link B SAE 1708

H1

LT BLU

1902

AAS Modulator Feed Left Front

H2

WHT

1909

AAS Wheel Speed Sensor Signal Right Front

H3

BRN/WHT

1910

AAS Wheel Speed Sensor Return Right Front

J1

LT GRN

1903

AAS Wheel Speed Sensor Signal Left Front

J2

ORN

1904

AAS Wheel Speed Sensor Return Left Front

J3

BLK

150

Ground

K1

PNK

1905

Retarder Disable Output

K2

PNK

1939

Fuse Output Ignition 1 Type III Fuse

K3

PNK

1939

Fuse Output Ignition 1 Type III Fuse

Electronic Brake Control Module (EBCM) C2


Object Number: 230155 Size: CH

Connector Part Information
    • 12040921
    • 18 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A1

PPL

1920

AAS Modulator Feed Right Rear

A2-A3

--

--

Not Used

B1

PNK/BLK

1919

AAS Modulator Output Hold Right Rear

B2-B3

--

--

Not Used

C1

LT GRN/WHT

1918

AAS Modulator Output Exhaust Right Rear

C2-C3

--

--

Not Used

D1

GRY/BLK

1913

AAS Modulator Output Exhaust Left Rear

D2-D3

--

--

Not Used

E1

LT BLU/BLK

1914

AAS Modulator Output Hold Left Rear

E2

LT GRN/BLK

1916

AAS Wheel Speed Sensor Signal Right Rear

E3

LT BLU/WHT

1917

AAS Wheel Speed Sensor Return Right Rear

F1

ORN

1915

AAS Modulator Feed Left Rear

F2

DK BLU/WHT

1911

AAS Wheel Speed Sensor Signal Left Rear

F3

DK GRN/WHT

1912

AAS Wheel Speed Sensor Return Left Rear

Exhaust Brake Solenoid Valve


Object Number: 68721 Size: CH

Connector Part Information
    • 15300027
    • 2 Way F Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

1962

Engine Brake Solenoid Feed

B

BLK

150

Ground

Exhaust Brake Air interlock Relay (ABS Air)


Object Number: 39685 Size: CH

Connector Part Information
    • 12110539
    • 5 Way F Metri-Pack 280 Series, Flexlock, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

30

PPL

1146

Engine Brake Enable Signal

85

PPL

1146

Engine Brake Enable Signal

86

PNK

1905

Retarder Disable Output

87

--

--

Not Used

87A

BLK/WHT

1962

Engine Brake Solenoid Feed

Exhaust Brake Switch


Object Number: 62432 Size: CH

Connector Part Information
    • 12041492
    • 5 Way F, Metri-Pack 280 Series (BLK)

Pin

Wire Color

Circuit No.

Function

A

BLK/WHT

1962

Engine Brake Solenoid Feed

B

BLK

150

Ground

C

--

--

Not Used

D

WHT

1961

Engine Brake Switch Output

E

BLK/WHT

1962

Engine Brake Solenoid Feed

Park Brake Indicator Switch


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

Wheel Speed Sensor (WSS) Left Front


Object Number: 258922 Size: CH

Connector Part Information
    • 12162852
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN

1903

AAS Wheel Speed Sensor Signal Left Front

B

ORN

1904

AAS Wheel Speed Sensor Return Left Front

Wheel Speed Sensor (WSS) Left Rear


Object Number: 258922 Size: CH

Connector Part Information
    • 12162852
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

DK BLU/WHT

1911

AAS Wheel Speed Sensor Signal Left Rear

B

DK GRN/WHT

1912

AAS Wheel Speed Sensor Return Left Rear

Wheel Speed Sensor (WSS) Right Front


Object Number: 258922 Size: CH

Connector Part Information
    • 12162852
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

WHT

1909

AAS Wheel Speed Sensor Signal Right Front

B

BRN/WHT

1910

AAS Wheel Speed Sensor Return Right Front

Wheel Speed Sensor (WSS) Right Rear


Object Number: 258922 Size: CH

Connector Part Information
    • 12162852
    • 2 Way F Metri-Pack 150 Series, Sealed (BLK)

Pin

Wire Color

Circuit No.

Function

A

LT GRN/BLK

1916

AAS Wheel Speed Sensor Signal Right Rear

B

LT BLU/WHT

1917

AAS Wheel Speed Sensor Return Right Rear