Freestar V6-4.2L VIN 2 (2004)
Trailer Lamps: Initial Inspection and Diagnostic Overview
INSPECTION AND VERIFICATION
1. Verify the customer concern.
2. Verify the exterior lighting system of the vehicle is operating correctly. If not, refer to the appropriate pinpoint test. See: Pinpoint Tests
3. Visually inspect for obvious signs of mechanical or electrical damage.
VISUAL INSPECTION CHART
Electrical
-
Bussed electrical center (BEC) fuse(s):
-
46 (20A) (trailer tow stop/turn)
-
52 (20A) (trailer tow parking)
-
58 (30A)
-
62 (30A)
-
65 (30A)
-
BEC
-
Circuity
-
Relay(s)
-
Bulb(s)
4. 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.
5. 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.
6. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
7. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
-
SCP, ISO or UBP circuit fault; all electronic control units no response/not equipped, refer to Information Bus (Module Communications
Network).
-
No response/not equipped for SJB, refer to Information Bus (Module Communications Network).
-
System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self-test
diagnostics for the SJB.
8. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index. See: Diagnostic
Trouble Code Descriptions
9. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics. See: Symptom Related Diagnostic Procedures
