Symptom Chart
WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart
| Condition |
Possible Sources |
Action |
- No communication with the smart junction box (SJB)
|
- Fuse
- Wiring, terminals or connectors
- SJB
|
|
- Both low beams are inoperative
|
NOTE:
Due to varying wattage ratings and resulting current draw, certain aftermarket headlamp bulbs may cause the SJB to shut down the short circuit protection, resulting in the low beams becoming inoperative.
- Incorrect bulbs
|
- VERIFY that the bulbs meet Ford specifications. If the bulbs do not meet Ford specifications, INSTALL the correct bulbs. RUN the on-demand self-test (required to clear certain DTCs and reset the SJB). CORRECT any unresolved DTCs. CLEAR all DTCs. TEST the system for normal operation.
|
| |
|
- CHECK for recorded SJB DTCs.
- If DTCs are present, REFER to DTC Charts in this.
|
- Both high beams are inoperative
|
- Fuse
- Wiring, terminals or connectors
- Joint connector
- Multifunction switch
- SJB
|
|
- One low beam headlamp is inoperative
|
- Fuse
- Wiring, terminals or connectors
- Joint connector
- Headlamp assembly (MKX)
- SJB
|
|
- One high beam headlamp is inoperative
|
- Wiring, terminals or connectors
- Joint connector
- Headlamp assembly (MKX)
|
|
- The headlamp(s) are on continuously
|
- Wiring, terminals or connectors
- Joint connector
- Headlamp switch
- Multifunction switch
- Windshield wiper motor
- SJB
|
|
- The flash-to-pass feature is inoperative
|
- Wiring, terminals or connectors
- Multifunction switch
- SJB
|
|