Pinpoint Test S: The Parking, Rear, Or License Plate Lamps Are On Continuously
WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
- S1 USE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCs) FROM THE SJB SELF-TEST
- Key in OFF position.
- Using the recorded results from the SJB self-test:
- Was DTC B1578 present?
Yes: GO to S2.
No: GO to S4.
- S2 CHECK CIRCUIT 1401 (BK/LG) FOR A SHORT TO GROUND
- Disconnect: SJB C2280d.
- Disconnect: Headlamp Switch C205.
- Measure the resistance between the headlamp switch C205-5, circuit 1401 (BK/LG) and ground.
- Is the resistance greater than 10,000 ohms?
Yes: GO to S3.
No: REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
- S3 CHECK THE HEADLAMP SWITCH
- Carry out the headlamp switch component test. Refer to COMPONENT TESTING article for component testing.
- Is the headlamp switch OK?
Yes : GO to S5.
No : INSTALL a new headlamp switch. CLEAR the DTCs. REPEAT the self-test.
- S4 CHECK CIRCUITS 1057 (OG/BK) AND 1058 (BN/WH) FOR A SHORT TO VOLTAGE
- Disconnect: SJB C2280a.
- Disconnect: SJB C2280e.
- Do the parking lamps continue to illuminate?
Yes: If the front lamps continue to illuminate, REPAIR circuit 1057 (OG/BK). TEST the system for normal operation.
If the rear lamps continue to illuminate, REPAIR circuit 1058 (BN/WH). TEST the system for normal operation.
No: GO to S5.
- S5 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes: INSTALL a new SJB. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.
No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.