Initial Inspection and Diagnostic Overview

1. Verify the customer's concern by operating the courtesy lamps to duplicate the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART

Mechanical
- Damaged lamps
- Open fuses
- Fuse junction panel No. 29 (15A)
- Stuck switches
- Connectors damaged/corroded

Electrical
- Generic electronic module
- Damaged switches
- Damaged bulbs
- Circuitry open/shorted

3. If inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.
4. If a concern remains after the inspection, use the Rotunda New Generation Star (NGS) Tester 007-00500 or equivalent, connected to the Data Link Connector (DLC) to retrieve continuous Diagnostic Trouble Codes (DTCs) and to execute Self Test Diagnostics for the generic electronic module as outlined.If after performing data link diagnostic test, NGS responds with module NO RESPONSE/NOT EQUIPPED, go to Pinpoint Test AC. AC No Comms With Generic Electronic Module
5. If self test is passed and no diagnostic trouble codes are retrieved, go to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures
6. If diagnostic trouble codes are retrieved, go to the DTC Reference Chart to continue diagnostics. Diagnostic Trouble Code Tests and Associated Procedures
7. If the generic electronic module cannot be accessed by the NGS, go to Pinpoint Test AC. AC No Comms With Generic Electronic Module