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Home >> Mercury >> 2005 >> Mountaineer 2WD V8-4.6L SOHC VIN W >> Repair and Diagnosis >> Lighting and Horns >> Headlamp >> Testing and Inspection >> Pinpoint Tests >> Headlamps >> Test A: Both Headlamps Are Inoperative

Test A: Both Headlamps Are Inoperative

PINPOINT TEST A: BOTH HEADLAMPS ARE INOPERATIVE


A1:






A1-A3:






Normal Operation
Battery voltage is supplied to the headlamp switch through circuit 196 (DB/OG). When the headlamp switch is placed in the headlamps ON position, voltage is transferred to circuit 13 (RD/BK) which supplies power to the low beam headlamps and to the multifunction switch.

Possible Causes
- Circuit 196 (DB/OG) open
- Circuit 13 (RD/BK) open
- Headlamp switch
- Multifunction switch