GM Service Manual Online
For 1990-2009 cars only
Connector 1: Body Control Module (BCM) C1
Connector 2: Body Control Module (BCM) C2
Connector 3: Body Control Module (BCM) C3
Connector 4: Body Control Module (BCM) C4
Connector 5: Data Link Connector (DLC)

Body Control Module (BCM) C1


Object Number: 73152  Size: CH

Connector Part Information

  • OEM: 12084945
  • Service: See Catalog
  • Description: 16-Way F Micro-Pack 100 Series (GY)

Terminal Part Information

  • Pins: A2, A3, A4, A7, A8, B4, B6, B7, B8
  • Terminal/Tray: 12146447/Delphi 3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)
  • Pins: B2
  • Terminal/Tray: 12146448/Delphi 19
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)
 

Body Control Module (BCM) C1

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

L-GN

1391

Driver Door Unlock Relay Control (AU0)

A3

L-BU

195

Door Lock Relay Control (AU0)

A4

WH

194

Door Unlock Relay Control (AU0)

A5-A6

--

--

Not Used

A7

OG/BK

781

Driver Door Lock Switch Unlock Signal

A8

RD/BK

780

Driver Door Lock Switch Lock Signal

B1

--

--

Not Used

B2

D-BU

1201

Headlamp Low Beam Signal

B3

--

--

Not Used

B4

GY

731

EVAP Temperature Sensor Signal (Except HP7)

B5

--

--

Not Used

B6

L-GN/BK

1137

DRL Ambient Light Sensor Signal (T82)

B7

YE/BK

1138

DRL Ambient Light Sensor Low Reference (T82)

B8

L-GN

66

A/C Request Signal (Except HP7)

Body Control Module (BCM) C2


Object Number: 73156  Size: CH

Connector Part Information

  • OEM: 12110088
  • Service: See Catalog
  • Description: 24-Way F Micro-Pack 100 Series (GY)

Terminal Part Information

  • Pins: A2, A4, A5, A7, A10, A11, A12, B1, B2, B3, B4, B6, B9, B10, B11, B12
  • Terminal/Tray: 12146447/Delphi 3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J35616-6 (BN)
  • Pins: A3
  • Terminal/Tray: 12146448/Delphi 19
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J35616-6 (BN)
  • Pins: A6, A8, A9, B5
  • Terminal/Tray: 12146448/Delphi 19
  • Core/Insulation Crimp: E/A
  • Release Tool/Test Probe: 12031876-1/J35616-6 (BN)
 
 

Body Control Module (BCM) C2

Pin

Wire Color

Circuit No.

Function

A1

--

--

Not Used

A2

L-BU

1134

Park Brake Switch Signal

A3

PK

1200

Headlamp High Beam Signal

A4

BN

41

Run Ignition 3 Voltage (HP7)

A5

PU

333

Brake Fluid Level Switch Signal

A6

BN

96

Windshield Wiper Switch Pulse Delay Signal

A7

L-BU

1788

Traction Control Switch Signal (1)

A8

PK

94

Windshield Washer Switch Signal

A9

RD

228

Windshield Washer Pump Control

A10

PK

339

Ignition 1 Voltage

A11

L-GN

80

Key In Ignition Switch Signal

A12

BK/WH

746

Passenger Doors Ajar Switch Signal

B1

YE

749

Security Indicator Control

B2

GY/BK

745

Left Front Door Ajar Switch Signal

B3

L-BU

292

Rear Defog Switch Signal

B4

RD/BK

744

Liftgate Ajar Switch Signal

B5

D-GN

392

Rear Window Washer Pump Control

B6

L-BU

74

Park Lamp Switch Signal (T82)

B7

OG

192

Fog Lamp Switch Signal (T96)

B8

--

--

Not Used

B9

YE

743

Accessory Voltage

B10

BN

9

Park Lamp Supply Voltage

B11

L-GN

1478

Coolant Level Switch Signal

B12

PU

719

Low Reference (Except HP7)

Body Control Module (BCM) C3


Object Number: 130689  Size: CH

Connector Part Information

  • OEM: 12110244
  • Service: See Catalog
  • Description: 24-Way F Micro-Pack 100 Series (PK)

Terminal Part Information

  • Terminal/Tray: 12146447/Delphi 3
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 12031876-1/J-35616-6 (BN)

Body Control Module (BCM) C3

Pin

Wire Color

Circuit No.

Function

A1

WH

156

Dome Lamp Control

A2

RD/WH

812

12-Volt Reference

A3

WH

352

Headlamp Relay Coil Supply Voltage (T82)

A4

YE

317

Fog Lamp Relay Control (T96)

A5

OG/BK

1445

Windshield Wiper Relay Control

A6

RD

2445

Rear Wiper Relay Control

A7

WH

1080

Park Lamp Relay Control (T82)

A8

L-GN/BK

592

DRL Relay Control

A9

BN/WH

230

I/P Lamps Dimming Control

A10

PU

1807

Class 2 Serial Data

A11

--

--

Not Used

A12

TN

2501

High Speed GMLAN Serial Data Bus-

B1

TN/WH

816

A/T Shift Lock Switch Signal (A/T)

B2

BK

28

Horn Relay Control

B3

OG/BK

1057

Low Reference

B4

GY

112

Windshield Wiper Switch Signal 1

B5

TN

470

Low Reference

B6

WH

193

Rear Defog Relay Control

B7

YE

1836

Security System Sensor Signal

B8

D-GN

113

Windshield Wiper Switch Signal 2

B9

PU

1807

Class 2 Serial Data

B10

PU

1807

Class 2 Serial Data

B11

--

--

Not Used

B12

TN/WH

2500

High Speed GMLAN Serial Data Bus+

Body Control Module (BCM) C4


Object Number: 73158  Size: CH

Connector Part Information

  • OEM: 12110626
  • Service: See Catalog
  • Description: 8-Way F Metri-Pack 280 Series (GY)

Terminal Part Information

  • Pins: A, E, H
  • Terminal/Tray: 12110844/Delphi 4
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
  • Pins: D, F
  • Terminal/Tray: 12110844/Delphi 4
  • Core/Insulation Crimp: C/A
  • Release Tool/Test Probe: 15315247/J-35616-4A (PU)
 

Body Control Module (BCM) C4

Pin

Wire Color

Circuit No.

Function

A

OG

1732

Courtesy Lamps Supply Voltage

B-C

--

--

Not Used

D

OG

2540

Battery Positive Voltage (HP7)

RD/WH

2540

Battery Positive Voltage (Except HP7)

E

GY

8

Instrument Panel Lamps Dimmer Switch Signal

F

BK/WH

151

Ground

G

--

--

Not Used

H

OG

1640

Battery Positive Voltage (HP7)

RD/WH

1640

Battery Positive Voltage (Except HP7)

Data Link Connector (DLC)


Object Number: 1243575  Size: CH

Connector Part Information

  • OEM: 348822-2
  • Service: See Catalog
  • Description: 16-Way F Diangnostic Connector (BK)

Terminal Part Information

  • Terminal/Tray: 776001-1/Lear 16
  • Core/Insulation Crimp: E/C
  • Release Tool/Test Probe: 15315247/J-35616-2A (GY)

Data Link Connector (DLC)

Pin

Wire Color

Circuit No.

Function

1

D-GN

5060

Low Speed GM LAN Serial Data (U32/U2K)

2

PU

1807

Class 2 Serial Data

3

--

--

Not Used

4

BK

550

Ground

5

BK/WH

151

Ground

6

TN/WH

2500

High Speed GMLAN Serial Data Bus+ (HP7)

7

BN/WH

2960

Keyword Serial Data (Except HP7)

8-11

--

--

Not Used

12

WH/BK

5043

Keyword Serial Data (Except HP7)

13

--

--

Not Used

14

TN

2501

High Speed GMLAN Serial Data Bus- (HP7)

15

--

--

Not Used

16

OG

340

Battery Positive Voltage