Pinpoint Test D: One Low Beam Headlamp Is Inoperative

D1 CHECK THE VOLTAGE TO THE INOPERATIVE HEADLAMP BULB
- Disconnect: Inoperative Headlamp.
- Place the headlamp switch in the ON position.
- Place the multifunction switch in the low beam position.
- Measure the voltage between RH headlamp C1041 Pin 3, Circuit 1056 (DB/LG), or LH headlamp C1021 Pin 3, Circuit 1055 (WH/LG), harness side and ground.
  
  Fig 1: Checking Voltage To Inoperative Headlamp Bulb
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
1. Yes: INSTALL a new headlamp bulb; REFER to BULB - HEADLAMP . TEST the system for normal operation.
2. No: REPAIR the circuit. TEST the system for normal operation.