Town Car V8-4.6L SOHC VIN W (1999)
Cornering Lamp: Flow of Diagnosis
1. Verify the customer concern by operating the turn signal/cornering/hazard lamps.
2. Visually inspect for obvious signs of mechanical and electrical damage; refer to the following chart:
VISUAL INSPECTION CHART
Mechanical
^
Multi-function switch
Electrical
^
Blown fuse(s)
^
Damaged wiring harness
^
Loose or corroded connection
^
Turn signal/hazard bulb(s)
^
Lighting control module (LCM)
3. If the inspection reveals obvious concern(s) that can be readily identified, repair as required.
4. If the concern remains after the inspection, connect the New Generation Star (NGS) Tester to the Data Link Connector (DLC) located beneath the
instrument panel and select the vehicle to be tested from the NGS menu. If the NGS does not communicate with the vehicle:
^
check that the program card is properly installed.
^
check the connections to the vehicle.
^
check the ignition switch position.
5. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
6. Perform the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
^
CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus.
^
NO RESP/NOT EQUIP for lighting control module (LCM), go to Pinpoint Test A. See: Headlamp/Testing and Inspection/Component Tests
and General Diagnostics/With Manual Headlamps/Pinpoint Tests/A No Communication With the Lighting Control Module
^
SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and perform self-test
diagnostics for the LCM.
7. If the DTCs retrieved are related to the concern, go to the LCM 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
