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 (BCM) C3
2005 Pontiac Montana SV6 AWDSECTION Body Control Module (BCM) C3
Computer/Integrating Systems Connector End Views
Connector Part InformationÂ
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Terminal Part InformationÂ
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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 |
RENDER: 1.0x
NO RELATED
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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.