Pinpoint Test D: The Control Illumination Is Always On - All Hardwired Illumination

WARNING: This page is about a different car, the 2009 Mercury Milan, 2009 Lincoln MKZ, and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

D1 CHECK THE EXTERIOR LIGHTING
- Key in OFF position.
- Make sure the headlamp switch is in the OFF position.
- Observe the exterior lighting components.
- Are any exterior lighting components illuminated?
1. YES : REFER to EXTERIOR LIGHTING article.
2. NO : Go to D2.
D2 CHECK CIRCUIT VLN04 (VT/GY) OR CLN04 (BU/BN) FOR A SHORT TO VOLTAGE
- Disconnect: SJB C2280d
- Key in ON position.
- Do the dimmable hardwired illumination components continue to illuminate?
1. YES : REPAIR the circuit in question. TEST the system for normal operation.
2. NO : Go to D3.
D3 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - damaged pins
  - 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?
1. YES : INSTALL a new SJB. REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
2. NO : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.