Pinpoint Test G: The Door Lock Control Switch Illumination Is Inoperative

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.

G1 CHECK CIRCUIT 2086 (RD/LB) FOR AN OPEN
- Disconnect: LH door lock control switch C541 or RH door lock control switch C605.
- Key in ON position.
- MEASURE the voltage between the LH door lock control switch C541-4, circuit 2086 (RD/LB), harness side and ground; or between the RH door lock control switch C605-4, circuit 2086 (RD/LB), harness side and ground.
  
  Fig 1: Measuring Voltage Between LH Door Lock Control Switch C541-4, Circuit 2086 (RD/LB), Harness Side & Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes: INSTALL a new door lock control switch. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.

No: VERIFY the smart junction box (SJB) fuse 15 (10A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.