GM Service Manual Online
For 1990-2009 cars only
Table 1: Body Control Module (BCM) C1
Table 2: Body Control Module (BCM) C2
Table 3: Body Control Module (BCM) C3

Body Control Module (BCM) C1


Object Number: 73156  Size: CH

Connector Part Information

    • 12110088
    • 24-Way F Micro-Pack 100 Series (L-GY)

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

WH

2282

Headlamp Washer Relay Control (CE4)

A3

OG

1140

Battery Positive Voltage

A4

BK/WH

1969

Headlamp High Beam Relay Control

A5

PK/WH

1970

Headlamp Low Beam Relay Control

A6

PK

5363

Incline Sensor Alarm Signal (BAE)

A7-A8

--

--

Not Used

A9

TN

5458

Midgate Overhead Console Switch Up Signal (Z88)

A10-A11

--

--

Not Used

A12

WH

278

Ambient Light Sensor Signal

B1

L-GN

1037

BCM Class 2 Serial Data

B2

BK

279

Ambient Light Sensor Low Reference

B3

L-GN

2270

Rear Window Washer Relay Control

B4

GY/BK

2226

Instrument Panel Lamps Dimmer Switch Low Reference

B5

GY

705

5-Volt Reference

B6

WH

2283

Rear Wiper/Washer Switch Supply Voltage

B7

OG/BK

2090

Courtesy Lamps Supply Voltage

B8

L-GN

1011

Remote Radio Control Signal

B9

GY

391

Rear Window Wiper Switch Signal

B10

YE

1836

Security System Sensor Signal

B11

GY

2521

Right Sunload Sensor Signal

B12

L-BU/BK

2519

Left Sunload Sensor Signal

Body Control Module (BCM) C2


Object Number: 646417  Size: CH

Connector Part Information

    • 12110112
    • 32-Way F Micro-Pack 100 (TN)

Pin

Wire Color

Circuit No.

Function

E1-E2

--

--

Not Used

E3

L-GN

80

Key In Ignition Switch Signal

E4

YE

307

Headlamp Switch Flash to Pass Signal

E5

GY/BK

308

Park Lamp Switch Signal

E6

PK/BK

109

Hood Ajar Switch Signal (UA2)

E7

PK

1348

Headlamp On Indicator Control

E8

BK

1835

Security System Sensor Low Reference

E9

RD/WH

812

12-Volt Reference

E10

--

--

Not Used

E11

DK GN/

WH

1317

Fog Lamp Relay Control (T96)

E12

BK

28

Horn Relay Control

E13

--

--

Not Used

E14

TN

5463

DRL Defeat On Indicator Control

E15-E16

--

--

Not Used

F1-F2

--

--

Not Used

F3

D-GN

113

Windshield Wiper Switch Signal 2

F4

D-BU/WH

1495

Courtesy Lamps On Signal

F5

BN/WH

1871

Headlamp Washer Switch Signal (CE4)

F6

OG

192

Front Fog Lamps Switch Signal (T96)

F7

L-BU

187

Rear Fog Lamps Switch Signal (T79)

F8

L-GN

5462

DRL Defeat Switch Signal

F9

WH

103

Headlamp Switch Headlamps On Signal

F10

L-GN

11

Headlamp High Beam Supply Voltage

F11

PU

328

Interior Lamp Defeat Switch Signal

F12

D-BU

6252

Midgate Ajar Indicator Switch (Z88)

F13

PK

5068

Intrusion Sensor Switch Disable Signal (BAE)

F14

YE

710

Class 2 Serial Data

F15-F16

--

--

Not Used

Body Control Module (BCM) C3


Object Number: 697009  Size: CH

Connector Part Information

    • 15354796
    • 40-Way Flat Wire

Pin

Wire Color

Circuit No.

Function

A1

FW

2140

Battery Positive Voltage

A2

FW

2140

Battery Positive Voltage

A3

FW

748

Right Rear Door Ajar Switch Signal

A4

FW

1134

Park Brake Switch Signal

A5

FW

195

Door Lock Relay Control

A6

FW

2265

Power Window Lockout Left Rear Control

A7

--

--

Not Used

A8

--

747

Left Rear Door Ajar Switch Signal

A9- A10

--

--

Not Used

A11

FW

1350

Ground

A12

FW

1351

RAP Relay Supply Voltage

A13

FW

194

Door Unlock Relay Control

A14

FW

1080

Park Lamp Relay Control

A15

FW

5168

Power Sounder Enable Signal (BAE)

A16

FW

5204

Intrusion Sensor Data Signal

A17

--

--

Not Used

A18

FW

1390

Ignition 0 Voltage

A19

FW

39

Ignition 1 Voltage

A20

FW

541

Ignition 3 Voltage

B1

FW

230

Instrument Panel Lamps Dimming Control

B2

FW

230

Instrument Panel Lamps Dimming Control

B3

FW

690

Courtesy Lamp Supply Voltage

B4

FW

2240

Battery Positive Voltage

B5

FW

1186

Power Window Switch Right Rear Up Signal

B6

FW

2266

Power Window Lockout Right Rear Control

B7

FW

1188

Power Window Switch Right Rear Down Signal

B8

FW

1185

Power Window Switch Left Rear Up Signal

B9

FW

1187

Power Window Switch Left Rear Down Signal

B10

--

--

Not Used

B11

FW

1350

Ground

B12

FW

24

Backup Lamp Supply Voltage

B13

FW

4440

Battery Positive Voltage

B14

FW

1382

LED Dimming Signal

B15

FW

543

Accessory Voltage

B16

--

--

Not Used

B17

FW

4040

Battery Positive Voltage

B18

FW

1732

Courtesy Lamps Supply Voltage

B19

FW

1977

Rear Fog Lamp Relay and Indicator Control

B20

FW

5362

Incline Sensor Alarm On Signal (BAE)