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.
2004 Cadillac Escalade EXTFACTORY OEM SERVICE PROCEDURE
Body Control Module (BCM) C1
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Body Control Module (BCM) C1 Connector Parts Information
Connector Part Information
|
Body Control Module (BCM) C1 Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| A1 | - | - | Not Used |
| A2 | L-GN | 1391 | Driver Door Unlock Relay Control (AU0) |
| A3 | L-BU | 195 | Door Lock Relay Control (AU0) |
| A4 | WH | 194 | Door Unlock Relay Control (AU0) |
| A5-A6 | - | - | Not Used |
| A7 | OG/BK | 781 | Driver Door Lock Switch Unlock Signal |
| A8 | RD/BK | 780 | Driver Door Lock Switch Lock Signal |
| B1 | - | - | Not Used |
| B2 | D-BU | 1201 | Headlamp Low Beam Signal |
| B3 | - | - | Not Used |
| B4 | GY | 731 | EVAP Temperature Sensor Signal (Except HP7) |
| B5 | - | - | Not Used |
| B6 | L-GN/BK | 1137 | DRL Ambient Light Sensor Signal (T82) |
| B7 | YE/BK | 1138 | DRL Ambient Light Sensor Low Reference (T82) |
| B8 | L-GN | 66 | A/C Request Signal (Except HP7) |
Factory Service Tools
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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.
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