Mustang V6-3.9L VIN 6 (2004)
Courtesy Lamp: Initial Inspection and Diagnostic Overview
INSPECTION AND VERIFICATION
1. The interior lighting system is a generic electronic module (GEM) controlled system.
2. Verify the customer concern by operating the interior lighting system.
Visual Inspection Chart
3. Visually inspect for obvious signs of mechanical and electrical damage.
4. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and
select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
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check that the program card is correctly installed.
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check the connections to the vehicle.
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check the ignition switch position.
5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
6. Carry out the DATA LINK DIAGNOSTIC TEST. If the diagnostic tool responds with:
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CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus (Module Communications Network).
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NO RESP/NOT EQUIP for GEM, go to Pinpoint Test A. See: Pinpoint Tests/Test A
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SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test
diagnostics for the GEM.
7. If the DTCs retrieved are related to the concern, go to GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. See: Diagnostic
Trouble Code Descriptions
8. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. See: Symptom Related Diagnostic Procedures
