Pinpoint Test D: The Control Illumination Is Always On

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

D1 CHECK THE EXTERIOR LIGHTING
- Key in ON position.
- Make sure the headlamp switch is in the OFF position.
- Observe the exterior lighting components.
- Are any exterior lighting components illuminated?
Yes : REFER to EXTERIOR LIGHTING to continue diagnosis of the exterior lighting.

No : GO to D2.
D2 CHECK CIRCUIT VLN04 (VT/GY) FOR SHORT TO VOLTAGE
- Key in OFF position.
- Disconnect: SJB C2280d.
- Do the dimmable backlit components continue to illuminate?
Yes : REPAIR the circuit. TEST the system for normal operation.

No : GO to D3.
D3 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 MULTIFUNCTION ELECTRONIC CONTROL MODULES . 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.