Pinpoint Test H: An Individual Demand Lamp Is Inoperative: Testing

WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK DEMAND LAMP POWER CIRCUIT FOR VOLTAGE
- Key in OFF position.
- Disconnect: Inoperative Lamp.
- Measure the resistance between ground and the inoperative demand lamp:
  - overhead console (with roof opening panel) C930-3, circuit 705 (LG/OG).
  - overhead console (without roof opening panel) C929-1, circuit 705 (LG/OG).
  - second row dome lamp C961-3, circuit 705 (LG/OG).
  - third row dome lamp C963-3, circuit 705 (LG/OG).
  - LH visor C907-1, circuit 705 (LG/OG).
  - RH visor C906-1, circuit 705 (LG/OG).
    
    Fig 1: Measuring Resistance Between Ground And Inoperative Demand Lamp
    Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : INSTALL a new lamp. TEST the system for normal operation.
- No : REPAIR circuit 705 (LG/OG) for an open. TEST the system for normal operation.