polarbair

Okay its actually two. First where is the BCM3 for the '08 base models. Two I need to attach a wire to the A10 wire for dome light supervision. Which wire is A10?

thanks!

polarbair

A bunch of people have looked at this, but only one has responded. Let me rephrase the question. Is there a way to look at the plug and see how the wires are numbered? Are all plugs numbered in the same manner? (i.e. top left to bottom right?) Can anyone help?

thanks

I need to attach a wire so that the alarm can detect when the dome light comes on. If this isnt the best way, can someone on here who has installed alarms on our cars tell me where to attach the dome light supervision wire?

Spun

iTrader: (1)

Its in C3 and its grey
Here is a pin-out of the BCM
Its way down there but if you scroll down you will see it

Body Control Module (BCM) C1

Pin
Wire Color
Circuit No.
Function

1
L-BU/BK
747
Left Rear Door Ajar Switch Signal (Sedan)

2
Not Used


3
PU
5531
Hood Closed switch Signal

4
TN/BK
109
Hood Ajar Switch Signal

5
Not Used


6
WH
682
Door Lock Lock/Unlock Signal

7
WH
682
Door Lock Lock/Unlock Signal

8
WH
1080
Park Lamp Relay Control

9-12
Not Used

13
PK
849
Brake Fluid Level Sensor Signal

14
L-BU
1134
Park Brake Switch Signal

15
YE
5199
Run/Crank Relay Coil Control

16
WH
193
Rear Defog Relay Control

17
D-BU
15
Right Front Turn Signal Lamp Supply Voltage

18
D-GN
5060
Low Speed GMLAN Serial Data

19
TN/WH
746
Right Front Door Ajar Switch Signal

20
L-GN/BK
748
Right Rear Door Ajar Switch Signal (Sedan)

21
Not Used

22
GY/BK
745
Left Front Door Ajar Switch Signal

23-25
Not Used

26
L-GN
1478
Coolant Level Switch Signal (LSJ)

27-32
Not Used

33
D-GN/WH
1135
A/T Shift Lock Control Solenoid Supply Voltage (MN5/MX0)

34
Not Used

35
L-BU

14
Left Front Turn Signal Lamp Supply Voltage

36
D-GN
5060
Low Speed GMLAN Serial Data

37-43
Not Used

44
TN/WH
1969
Headlamp High Beam Relay Control

45-46
Not Used

47
YE
196
Windshield Wiper Motor Park Switch Signal

48-50
Not Used

51
D-GN
113
Windshield Wiper Switch Signal

52-53
Not Used

54
YE
317
Fog Lamp Relay Control (T37)

55
OG/BK
744
Rear Compartment Lid Ajar Switch Signal

56
OG/BK
737
Rear Compartment Lamp Control

57
BN
253
Trunk Release Relay Control

58-59
Not Used

60
TN
28
Horn Relay Control

61
BK/WH
1251
Ground

62
RD/WH
1240
Battery Positive Voltage

63
GY
596
5-Volt Reference - 1

64
BK/WH
751
Ground

65
TN/WH
1704
Low Reference

66
GY/BK
1798
Low Reference (Sedan)

67
YE/BK
61
Low Reference

68
WH
5075
Current Sensor Signal

69
Not Used

70
D-GN/WH
636
Ambient Air Temperature Sensor Signal

71
L-GN/BK
592
DRL Relay Control

72
Not Used


Body Control Module (BCM) C2



Pin
Wire Color
Circuit No.
Function


1
BN/WH
2500
High Speed GMLAN Serial Data (+)

2
TN/BK
2500
High Speed GMLAN Serial Data (+)

3
YE
10
Headlamp Switch Signal

4
PU
524
Headlamp Dimmer Switch High Beam Signal

5
BN/WH
301
Park Lamp Switch On Signal

6-8
Not Used

9
WH
111
Hazard Switch Signal

10
TN
1576
Rear Compartment Lid Release Switch

11
D-GN
264
Security Indicator Supply Voltage

12-13
Not Used

14
TN
28
Horn Relay Control

15
WH
103
Headlamp Switch Headlamps On Signal

16
OG
192
Front Fog Lamp Switch Signal (T37)

17
PU/WH
549
Headlamp Switch Headlamps Off Signal

18
Not Used

19
BN
2501
High Speed GMLAN Serial Data (-)

20
TN
2501
High Speed GMLAN Serial Data (-)

21-25
Not Used

26
D-GN
44
Instrument Panel Lamp Dimmer Switch Signal

27-37
Not Used

38
D-GN
5060
Low Speed GMLAN Serial Data

39-43
Not Used

44
L-GN/BK
1137
DRL Ambient Light Sensor Signal

45-46
Not Used

47
YE/BK
1138
DRL Ambient Light Sensor Low Reference

48-50
Not Used

51
BN
1356
Flash To Pass Switch Signal

52-53
Not Used

54
L-BU
20
Stop Lamp Supply Voltage

55
Not Used

56
WH
1390
Off/Run/Crank Voltage

57
GY
112
Windshield Wiper Switch Signal

58
PU
719
Low Reference

59-60
Not Used

61
GY
1884
Cruise Control Switch Signal (K34)

62
WH/BK
1073
Ignition Key Resistor Signal

63-65
Not Used

66
YE/BK
1418
Left Rear Turn Signal Switch Signal

67
D-GN/WH
1419
Right Rear Turn Signal Switch Signal

68
L-BU
292
Rear Defog Switch Signal

69
L-GN
66
A/C Request Signal (C67)

70
Not Used

71
PU
5234
Passenger Seatbelt Reminder

72
WH
193
Rear Defog Relay Control


Body Control Module (BCM) C3


Pin
Wire Color
Circuit No.
Function

A1
TN
294
Door Lock Actuator Unlock Control (AU3)

A2
TN
294
Door Lock Actuator Unlock Control (AU3) (Sedan)

TN
294
Door Lock Actuator Unlock Control (AU3) (Sedan)

A3
D-BU/WH
149
Courtesy Lamp Supply Voltage

A4
GY
295
Door Lock Actuator Lock Control (AU3) (Driver)
GY
295
Door Lock Actuator Lock Control (AU3) (Passenger)

A5
GY
295
Door Lock Actuator Lock Control (AU3) (Sedan)
GY
295
Door Lock Actuator Lock Control (AU3) (Sedan)

A6
Not Used

A7
BN
9
Park Lamp Supply Voltage

A8
PK
339
Run/Crank Ignition 1 Voltage (UQ3)

A9
YE
18
Left Rear Stop/Turn Lamp Supply Voltage

A10
GY
157
Courtesy Lamp Control

A11
Not Used

A12
D-GN
19
Right Rear Stop/Turn Lamp Supply Voltage

B1
TN
694
Driver Door Lock Actuator Unlock Control

B2
Not Used

B3
RD/WH
1240
Battery Positive Voltage
RD/WH
1240
Battery Positive Voltage

B4
Not Used

B5
BN
4
Accessory Voltage
BN
4
Accessory Voltage (L61/LE5)

B6-B7
Not Available

B8-B11
Not Used

B12
GY
8
Instrument Panel Lamp Supply Voltage (LSJ) and (J41)

B12
GY
8
Instrument Panel Lamp Supply Voltage (L61/LE5)
GY
8
Instrument Panel Lamp Supply Voltage (L61/LE5)

C1-C2
Not Available

C3
D-GN
1301
Retained Accessory Power Fuse Supply Voltage

C4
Not Used

C5
D-GN
801
Retained Accessory Power Fuse Supply Voltage

C6-C7
Not Available

C8-C11
Not Used

C12
OG
228
Windshield Washer Pump Control

D1
RD/BK
142
Battery Positive Voltage

D2
Not Available

D3
Not Used

D4
RD/WH
840
Battery Positive Voltage

D5
D-GN
801
Retained Accessory Power Fuse Supply Voltage

D6
PK
739
Run/Crank Ignition 1 Voltage

D7
PK
1339
Ignition 1 Voltage

D8-D9
Not Used

D10
RD/BK
442
Battery Positive Voltage

D11
Not Used

D12
RD/WH
242
Battery Positive Voltage


Body Control Module (BCM) C4

Pin
Wire Color
Circuit No.
Function

A1
RD/WH
640
Battery Positive Voltage (UQ3)

A2-A12
Not Used

B1
OG
228
Windshield Washer Pump Control

B2
GY
8
Instrument Panel Lamp Supply Voltage

B3-B12
Not Used

C1
RD/WH
1440
Battery Positive Voltage

C2
GY
8
Instrument Panel Lamp Supply Voltage

GY
8
Instrument Panel Lamp Supply Voltage

C3-C5
Not Used

C6-C7
Not Available

C8
BN
4
Accessory Voltage

C9-C10
Not Used

C11
GY
8
Instrument Panel Lamp Supply Voltage

C12
GY
8
Instrument Panel Lamp Supply Voltage

D1
RD/WH
1040
Battery Positive Voltage

D2
Not Used

D3
YE
5199
Run/Crank Voltage

D4
BN
141
Ignition3 Voltage

D5
Not Used

D6-D7
Not Available

D8-D9
Not Used

D10
RD/WH
1140
Battery Positive Voltage
RD/WH
1140
Battery Positive Voltage

D11-D12
Not Used

E1
RD/WH
140
Battery Positive Voltage

E2-E5
Not Used

E6
PK
439
Ignition1 Voltage
PK
439
Ignition1 Voltage (Coupe) (TV5)

E7-E11
Not Used

E12
BK/WH
651
Ground

F1
RD/WH
1540
Battery Positive Voltage
RD/WH
1540
Battery Positive Voltage

F2
Not Used

F3
GY
8
Instrument Panel Lamp Supply Voltage
GY
8
Instrument Panel Lamp Supply Voltage

F4
PK
339
Ignition1 Voltage
PK
339
Ignition1 Voltage

F5
PK
339
Ignition1 Voltage
PK
339
Ignition1 Voltage

F6
PK
339
Ignition1 Voltage

F7-F8
Not Used

F9
PK
1539
Ignition1 Voltage
PK
1539
Ignition1 Voltage

F10-F12
Not Used

polarbair

EXACTLY what I needed!!!!!!!!!!!! THANK YOU!!!!!!! YOU ROCK!

pccobra

Wow great info....do you have the same info for the 2009 Cobalt, I'm putting in a remote starter.

Spun

iTrader: (1)

I'm pretty sure the 08 and 09's are the same.
You have an LT so it should line up the same.
The only wiring difference that I know of is from the 06 to the 07's

DaBuzzard

Damn, this is sticky worthy imho

Great info

pccobra

Great, excellent, thanks for the info. :-)