Generator Whine Concerns
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the ground terminal and cable for high resistance.
- Inspect the generator and brackets for loose or coated mounting bolts.
- Verify that the ground straps between the engine and the frame are clean and tight.
- If the noise is still present, inspect the electrical system for proper operation. Refer to DIAGNOSTIC STARTING POINT--ENGINE ELECTRICAL in Engine Electrical.
- Install a filter GM P/N 1224205 in the battery voltage feed circuit to the radio.
- If the noise is not eliminated, install the filter in each following variation:
- Install the filter with the single wire side toward the radio and the ground wire attached to chassis ground.
- Remove the ground to the filter.
- Reverse the filter so that the two-wire side is toward the radio with the ground wire attached to chassis ground.
- Remove the ground from the filter.
- If the filter GM P/N 1224205 causes a delay when turning the radio ON or OFF, or other problems, remove the filter and Install a 0.47 micro farad capacitor to chassis ground.
- Before reassembling the vehicle, remove any unneeded filters.
- Test the functionality of all the vehicle systems, including those not related to the audio system, for proper operation and function.