BCM question
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BCM question
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!
thanks!
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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?
Last edited by polarbair; 01-31-2009 at 08:49 PM. Reason: Automerged Doublepost
#3
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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
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
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