Turn Signal and Hazard Lamps
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Refer to Wiring Diagrams Cell 90 for schematic and connector information.
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
NOTE: Make sure the headlamp switch is in the OFF position.
4. If the cause is not visually evident, connect the diagnostic tool to the data link connector and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does
not communicate with the vehicle:
check that the program card is correctly installed.
check the connections to the vehicle.
check the ignition switch position.
5. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
6. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
SCP, ISO or UBP circuits, all electronic control units no response/not equipped, refer to Section 418-00.
No response/not equipped for FEM, refer to Section 418-00.
No response/not equipped for REM, refer to Section 418-00.
No response/not equipped for instrument cluster, refer to Section 413-00.
SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the FEM.
7. If the DTCs retrieved are related to the concern, go to the Front Electronic Module (FEM) Diagnostic Trouble Code (DTC) Index, the Rear Electronic Module (REM) Diagnostic
Trouble Code (DTC) Index or the Instrument Cluster Diagnostic Trouble Code (DTC) Index.
8. If multiple symptoms exist, check the Switched System Power (SSP) Relay Index before proceeding to the next step. Refer to Headlamps in this section.
9. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics.
NOTE: For a complete master list of DTCs, refer to Section 418-00.
Front Electronic Module (FEM) Diagnostic Trouble Code (DTC) Index
SECTION 417-01: Exterior Lighting 2003 Thunderbird Workshop Manual
DIAGNOSIS AND TESTING
Procedure revision date: 03/04/2003
Special Tool(s)
73III Automotive Meter
105-R0057 or equivalent
Worldwide Diagnostic System (WDS)
418-F224,
New Generation STAR (NGS) Tester
418-F052, or equivalent diagnostic tool with appropriate adapter cable
Mechanical Electrical
Multifunction switch
Battery junction box (BJB) fuse(s):
3 (10A) (LH rear lamp)
7 (10A) (RH rear lamp)
Central junction box (CJB) fuse(s):
8 (5A) (RH front parking/turn lamp)
10 (5A) (LH front parking/turn lamp)
Circuitry
Bulbs
Front electronic module (FEM)
Rear electronic module (REM)
Instrument cluster
DTC Description Source Action
B1342 ECU Is Defective FEM CLEAR the DTCs. RETRIEVE the DTCs. If DTC B1342 is retrieved, INSTALL a new FEM. REFER to Section 418-00.
B1499 Lamp Turn Signal Left Circuit Failure FEM If inoperative, GO to Pinpoint Test Q.
If always on, GO to Pinpoint Test R.
B1501 Lamp Turn Signal Left Circuit Short to Battery FEM GO to Pinpoint Test Q.
B1503 Lamp Turn Signal Right Circuit Failure FEM If inoperative, GO to Pinpoint Test Q.
If always on, GO to Pinpoint Test R.
2003 Thunderbird Workshop Manual
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS3D/~MUS~LEN/19/S
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