Town Car V8-4.6L SOHC VIN W (1999)
Daytime Running Lamp: Flow of Diagnosis
NOTE: The Lighting Control Module (LCM) must be reconfigured upon replacement. Refer to the NGS Tester help screen on the configuration card to
program the headlamps on with wipers, DRL (for Canadian vehicles), and Korean vehicle strategy.
1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage.
VISUAL INSPECTION CHART
Electrical
^
Blown fuse(s)
^
Headlamp switch wiring
3. 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.
4. If the NGS still does not communicate with the vehicle, refer to the New Generation STAR Tester manual.
5. Perform the DATA LINK DIAGNOSTIC TEST. If the NGS responds with:
^
CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP.
^
NO RESP/NOT EQUIP for lighting control module (LCM), go to Pinpoint Test A. See: Pinpoint Tests/A No Comm
w/LCM-Unable/On-Demand Self-Test On LCM
^
SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and perform self- test
diagnostics for the LCM.
6. If the DTCs retrieved are related to the concern, go to LCM Diagnostic Trouble Code (DTC) Index to continue diagnostics. See: Diagnostic
Trouble Code Descriptions/Lighting Control Module Diagnostic Trouble Code Index
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. See: Symptom Related Diagnostic Procedures
