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.
Starter Generator Control Module Cooling Fan Always On
2004 Oldsmobile Bravada RWDSECTION Starter Generator Control Module Cooling Fan Always On
WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
Starter Generator Control Module Cooling Fan Always On
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Engine Cooling Schematics Connector End View Reference: Cooling System Connector End Views DEFINITION: The starter/generator control module (SGCM) coolant fan motor runs continuously. |
|||
| 1 | Did you perform the Engine Cooling Diagnostic System Check? | Go to Step 2 | Go To Diagnostic System Check - Engine Cooling |
| 2 | Turn ON the ignition, with the engine OFF. Is the SGCM coolant fan running all the time? |
Go to Step 3 | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems |
| 3 | Remove the SGCM coolant fan relay. Did the coolant fan turn OFF? |
Go to Step 5 | Go to Step 4 |
| 4 | Repair the short to power in the SGCM coolant fan motor supply voltage circuit. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 7 | - |
| 5 | Inspect for poor connections at the SGCM coolant fan relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 7 | Go to Step 6 |
| 6 | Replace the SGCM coolant fan relay. Did you complete the repair? |
Go to Step 7 | - |
| 7 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |
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.