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.
2007 Hummer H3 AutomaticFACTORY OEM SERVICE PROCEDURE
Generator Battery Control Module
Generator Battery Control Module Connector Parts Information
Connector Part Information
|
Terminal Part Information
|
Generator Battery Control Module Connector Terminal Identification
| Pin | Wire Color | Circuit No. | Function |
|---|---|---|---|
| A | OG | 3040 | Battery Positive Voltage |
| B | GY | 23 | Generator Field Duty Cycle Signal |
| C | OG | 3140 | Battery Positive Voltage |
| D | RD | 225 | Generator Turn On Signal |
| E | - | - | Not Used |
| F | BK/WH | 451 | Ground |
| G | - | - | Not Used |
| H | BK/WH | 451 | Ground |
| J | PU | 5428 | Generator Regulator Control |
| K | PU | 1807 | Class 2 Serial Data |
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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