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

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

B1 CHECK THE EXTERIOR LIGHTING
- Key in OFF position.
- Observe the exterior lighting components.
- Are any exterior lighting components illuminated?
1. YES : REFER to EXTERIOR LIGHTING article.
2. NO : Go to B2.
B2 CHECK CIRCUITS VLN04 (VT/GY) FOR A SHORT TO VOLTAGE
- Disconnect: SJB C2280b
- Key in ON position.
- Do the dimmable backlighted components continue to illuminate?
1. YES : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
2. NO : Go to B3.
B3 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. CLEAR the DTCs. REPEAT the self-test.