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: Data Link Connector (DLC)

Body Control Module (BCM) C1


Object Number: 1243543  Size: CH

Connector Part Information

  • OEM: 15448125 (Early Production)
  • OEM: 13545357 (Late Production)
  • Service: Not Serviced
  • Description: 52-Way F AMP Hybrid (BK)

Terminal Part Information

  • Pins: 1-40
  • Terminal: 638551-1/Tray 16
  • Core/Insulation Crimp: Pins 1-16, 21-31, 34-38, 40: J/J
  • Core/Insulation Crimp: Pins 17-20, 33, 39: K/K
  • Release Tool/Test Probe: 15315247/J-35616-64A
  • Pins: 41-52
  • Terminal: 1326030-6/Tray 17
  • Core/Insulation Crimp: Pins 41, 42, 47: E/2
  • Core/Insulation Crimp: Pins 43-46, 48-52: E/C
  • Release Tool/Test Probe: 12094429/J-35616-4A

Body Control Module (BCM) C1

Pin

Wire Color

Circuit No.

Function

1

TN

860

Front Windshield Wiper Switch High Signal

2

WH

1459

Security System Sensor Supply Voltage

3

PK

1439

Ignition 1 Voltage

4

TN

28

Horn Relay Control

5

OG

300

Run Relay Control

6

TN

707

RAP Relay Coil Control

7

TN/WH

1969

Headlamp High Beam Relay Control

8

--

--

Not Used

9

PK/WH

1970

Headlamp Low Beam Relay Control

10

WH

1080

Park Lamp Relay Control

11

YE

749

Security Indicator Control

12

GY

91

Windshield Wiper Switch Signal 2

13

YE

196

Windshield Wiper Motor Park Switch Signal

14

TN

1835

Low Reference

15

L-GN/BK

1137

DRL Ambient Light Sensor Signal

16

YE

5066

Brake Pedal Position Sensor Signal

17

BK/WH

1651

Ground

18

--

--

Not Used

19

BK/WH

151

Ground

20

BK/WH

1651

Ground

21

YE

5

Crank Voltage

22

PK

1239

Ignition 1 Voltage

23

BN

1141

Accessory Voltage

24

--

--

Not Used

25

WH/BK

644

12-Volt Reference

26

PK/BK

109

Hood Ajar Switch Signal

27

OG

5688

10-Volt Reference

28

GY/BK

5689

Low Reference

29

BN/WH

230

Low Reference

30

PK

1444

I/P Dimming Control

31

OG/WH

812

I/P Dimming Voltage

32

--

--

Not Used

33

BN

5077

Low Reference

34

BN/WH

1571

Traction Control Switch Signal

35

GY/BK

1598

Courtesy Lamps Switch Off Signal

36

PK/BK

1597

Courtesy Lamps Switch On Signal

37

TN/WH

1455

Keyless Entry Signal

38

L-GN

1037

Class 2 Serial Data

39

L-GN

526

Stop Lamp Supply Voltage

40

L-GN

80

Key In Ignition Switch Signal

41

L-BU/WH

1314

Left Front Turn Signal Lamp Supply Voltage

42

D-BU/WH

1315

Right Front Turn Signal Lamp Supply Voltage

43

GY/BK

690

Courtesy Lamp High Control

44

OG

1732

Inadvertent Power Courtesy Lamp

45

--

--

Not Used

46

RD/WH

340

Battery Positive Voltage

47

OG

228

Windshield Washer Pump Control

48

GY

8

Instrument Panel Lamp Supply Voltage

49

D-GN/WH

1135

A/T Shift Lock Control Solenoid Control (w/o AQW)

GN/WH

1135

A/T Shift Lock Control Solenoid Control (AQW)

50

RD/WH

240

Battery Positive Voltage

51

RD/WH

2440

Battery Positive Voltage

52

RD/WH

1240

Battery Positive Voltage

Body Control Module (BCM) C2


Object Number: 1243543  Size: CH

Connector Part Information

  • OEM: 15444637 (Early Production)
  • OEM: 13545347 (Late Production)
  • Service: 88956475 (Early Production)
  • Service: See Catalog (Late Production)
  • Description: 52-Way F Receptacle 0.64, 2.8 (BK)

Terminal Part Information

  • Pins: 2-40
  • Terminal: 638551-1/Tray 16
  • Core/Insulation Crimp: Pins 2-8, 10-18, 25, 26, 31-40: J/J
  • Core/Insulation Crimp: Pins 9, 22-24, 30: K/K
  • Release Tool/Test Probe: 15315247/J-35616-64A
  • Pins: 43, 48
  • Terminal: Not Serviced in Kit
  • Core/Insulation Crimp: N/A
  • Release Tool/Test Probe: N/A
  • Pins: 42, 44-46, 49-52
  • Terminal: 1326030-6/Tray 17
  • Core/Insulation Crimp: Pins 42, 45, 46: E/2
  • Core/Insulation Crimp: Pins 44, 49-52: E/C
  • Release Tool/Test Probe: 12094429/J-35616-4A

Body Control Module (BCM) C2

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PK/BK

780

Driver Door Lock Switch Lock Signal

3

D-GN

5512

Liftgate Open Switch Signal

4

D-BU

245

Passenger Door Lock Switch Unlock Signal

5

L-GN/BK

748

Right Rear Door Ajar Switch Signal

6

YE/BK

1181

Right Rear Door Open Switch Signal

7

L-BU/BK

747

Left Rear Door Ajar Switch Signal

8

L-GN

1177

Right Front Door Open Switch Signal

9

L-BU

1134

Park Brake Switch Signal

10

L-BU

2380

Rear Parking Assist Chime Signal (UD7)

11

OG/BK

781

Driver Door Lock Switch Unlock Signal

12-15

--

--

Not Used

16

WH

193

Rear Defog Relay Control

17

TN/WH

746

Right Front Door Ajar Switch Signal

18

D-BU/WH

1179

Left Rear Door Open Switch Signal

19-21

--

--

Not Used

22

L-GN

1123

Door Lock Key Switch Lock Signal

23

WH

5075

Current Sensor Signal

24

PU

1124

Door Lock Key Switch Unlock Signal

25

TN

126

Left Front Door Open Switch Signal

26

GY/BK

745

Left Front Door Ajar Switch Signal

27-29

--

--

Not Used

30

WH

17

Stop Lamp Supply Voltage

31

L-BU

244

Passenger Door Lock Switch Lock Signal

32-34

--

--

Not Used

35

YE

2080

Low Reference

36

PK

2435

Low Reference

37

YE/BK

2079

Driver Heated Seat Cushion Temperature Sensor Signal

38

GY

2434

Passenger Heated Seat Cushion Temperature Sensor Signal

39

TN/WH

2430

Passenger Heated Seat Relay Control

40

PU

2477

Driver Heated Seat Relay Control

41

--

--

Not Used

42

L-GN

24

Backup Lamp Supply Voltage

43

YE

18

Left Rear Stop/Turn Lamp Supply Voltage

YE

18

Left Rear Stop/Turn Lamp Supply Voltage

44

GY

8

Instrument Panel Lamp Supply Voltage

45

L-GN

275

Park/Neutral Position Park Signal (E58 w/o AQW)

L-GN

275

Park/Neutral Position Park Signal (E59 w/o AQW)

L-GN

275

Park/Neutral Position Park Signal (AQW)

46

TN

694

Driver Door Lock Actuator Unlock Control

47

--

--

Not Used

48

D-GN

19

Right Rear Stop/Turn Lamp Supply Voltage

D-GN

19

Right Rear Stop/Turn Lamp Supply Voltage

49

RD/WH

440

Battery Positive Voltage

50

BK

550

Ground

51

TN

294

Door Lock Actuator Unlock Control

52

GY

295

Door Lock Actuator Lock Control

Body Control Module (BCM) C3


Object Number: 1243603  Size: CH

Connector Part Information

  • OEM: 15383281
  • Service: See Catalog
  • Description: 18-Way F AMP Unsealed (BK)

Terminal Part Information

  • Terminal: 638551-1/Tray 16
  • Core/Insulation Crimp: J/J
  • Release Tool/Test Probe: 15315247/J-35616-64A

Body Control Module (BCM) C3

Pin

Wire Color

Circuit No.

Function

1-3

--

--

Not Used

4

L-BU/WH

1414

Left Turn Signal Switch Signal

5

L-BU

1714

Windshield Wiper Switch Low Signal

6

L-GN

696

Cruise Control Cancel Signal (K34)

7

WH

103

Headlamp Switch Headlamps On Signal

8

BN/WH

301

Park Lamp Switch On Signal

9

--

--

Not Used

10

L-BU

1872

Headlamp Switch Headlamps Off Signal

11

--

--

Not Used

12

PU

524

Headlamp Dimmer Switch High Beam Signal

13

PK

94

Windshield Washer Switch Signal

14

BN

1356

Flash To Pass Switch Signal

15

BK/WH

1251

Ground

16

TN

2144

Hazard Switch Signal

17

D-BU/WH

1415

Right Turn Signal Switch Signal

18

L-GN

1715

Windshield Wiper Switch High Signal

Data Link Connector (DLC)


Object Number: 68793  Size: CH

Connector Part Information

  • OEM: 12110250
  • Service: Not Serviced
  • Description: 16-Way F Metri-Pack 150 Series (BK)

Terminal Part Information

  • Terminal: 12129484/Tray 5
  • Core/Insulation Crimp: See Terminal Repair Kit
  • Release Tool/Test Probe: See Terminal Repair Kit

Data Link Connector (DLC)

Pin

Wire Color

Circuit No.

Function

1

--

--

Not Used

2

PU

1132

Class 2 Serial Data

3

--

--

Not Used

4

BK

1450

Ground

5

BK/WH

1551

Ground

6

TN/BK

2500

High Speed GMLAN Serial Data Bus (+) (LZ9)

7-13

--

--

Not Used

14

TN

2501

High Speed GMLAN Serial Data Bus (-) (LZ9)

15

--

--

Not Used

16

RD/WH

2340

Battery Positive Voltage