Troubleshooting Hints

IMPORTANT: When testing for audio reception or noise, the vehicle should be outside away from metal buildings and utility lines, with the hood and rear compartment closed.

^ For reception concerns, first determine if the customer is within the listening area of the stations they are attempting to receive.
^ Compare the customers vehicle to another of similar model and audio system to determine if the condition is abnormal.
^ Most normal audio noises can be found on weak stations near the low end of the band. This noise is considered to be a normal condition.
^ Check for any aftermarket equipment that may have been installed on the vehicle. If aftermarket equipment is found disconnect it and check if the audio noise is still present.
^ If the noise is only from one speaker check for the flowing before speaker replacement:
- Isolate the noise using the J 39916 Delco Audio System Diagnostic Kit.
- Check that the speaker connections are clean and tight.
- Check that the speaker mounting is tight.
- Inspect for loose or incorrectly installed speaker or surrounding trim.
^ Ignition noise on the FM band may be a indicator of a ignition system breakdown.
^ Inspect that all vehicle grounds are clean, tight and free of corrosion.