Radio Noise

Use a noise sniffer in order to aid in diagnosing the radio noise.

Inspect the radio reception in an area that is free of the following items:
^ Tall buildings
^ Metal structures
^ Power lines
^ Florescent lighting
^ Power tools

Ignition noise on FM may indicate that the Electronic Ignition (EI) system is defective. Refer to Electronic Ignition System Diagnosis in Computers and Control Systems. Testing and Inspection Inspect the antenna coax connectors for the following conditions:
^ Corrosion
^ Bad connections

If you use a test antenna, ground the base of the test antenna to the vehicle body.

Coated screws or bolts can act as a poor ground.