Important: Review the system operation in order to familiarize yourself with the system functions. Refer to Power Mode Description and Operation and Retained Accessory Power Description and Operation.

1. Inspect for aftermarket devices which could affect the operation of the system. Refer to Checking Aftermarket Accessories.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

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

In order to diagnose the symptom, refer to the following: