Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Body Control Module Connector End View (BCM) C3
2006 Buick Rainier 4.2 S, AWDSECTION Body Control Module Connector End View (BCM) C3
Body Control Module (BCM) C3
| Connector Part Information |
|
||
|---|---|---|---|
| Pin | Wire Color | Circuit No. | Function |
| A1 | - | 2140 | Battery Positive Voltage |
| A2 | - | 2140 | Battery Positive Voltage |
| A3 | - | 748 | Right Rear Door Ajar Switch Signal |
| A4 | - | 1134 | Park Brake Switch Signal |
| A5 | - | 195 | Door Lock Control |
| A6 | - | 2265 | Power Window Lockout Left Rear Control |
| A7 | - | - | Not Used |
| A8 | - | 747 | Left Rear Door Ajar Switch Signal |
| A9- A10 | - | - | Not Used |
| A11 | - | 1350 | Ground |
| A12 | - | 1353 | RAP Supply Voltage |
| A13 | - | 194 | Door Unlock Control |
| A14 | - | 1080 | Park Lamp Relay Control |
| A15 | - | 5168 | Power Sounder Enable Signal (BAE) |
| A16 | - | 5204 | Intrusion Sensor Data Signal (BAE) |
| A17 | - | - | Not Used |
| A18 | - | 992 | Ignition 0 Voltage |
| A19 | - | 39 | Ignition 1 Voltage |
| A20 | - | 541 | Ignition 3 Voltage |
| B1 | - | 230 | Instrument Panel Lamps Dimming Control |
| B2 | - | 230 | Instrument Panel Lamps Dimming Control |
| B3 | - | 690 | Courtesy Lamp Supply Voltage |
| B4 | - | 2240 | Battery Positive Voltage |
| B5 | - | 1186 | Power Window Switch Right Rear Up Signal |
| B6 | - | 2266 | Power Window Lockout Right Rear Control |
| B7 | - | 1188 | Power Window Switch Right Rear Down Signal |
| B8 | - | 1185 | Power Window Switch Left Rear Up Signal |
| B9 | - | 1187 | Power Window Switch Left Rear Down Signal |
| B10 | - | - | Not Used |
| B11 | - | 1350 | Ground |
| B12 | - | 24 | Backup Lamp Supply Voltage |
| B13 | - | 4440 | Battery Positive Voltage |
| B14 | - | 1382 | LED Dimming Signal |
| B15 | - | 543 | Accessory Voltage |
| B16 | - | - | Not Used |
| B17 | - | 4040 | Battery Positive Voltage |
| B18 | - | 1732 | Courtesy Lamps Supply Voltage |
| B19 | - | 1977 | Rear Fog Lamp Relay and Indicator Control |
| B20 | - | 5362 | Incline Sensor Signal (BAE) |
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.