Inspect for aftermarket devices which could affect the operation of the radio/audio system. Refer to Checking Aftermarket Accessories .

Inspect those system components which are easily accessible or visible for obvious damage or conditions which could cause the symptom.

Faulty electrical connections or wiring may cause intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom: