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Home >> Mercury >> 2005 >> Mountaineer 2WD V8-4.6L SOHC VIN W >> Repair and Diagnosis >> Lighting and Horns >> Courtesy Lamp >> Testing and Inspection >> Pinpoint Tests >> Test B: An Individual Interior Lamp Is Inoperative

Test B: An Individual Interior Lamp Is Inoperative

PINPOINT TEST B: AN INDIVIDUAL INTERIOR LAMP IS INOPERATIVE


B1-B2:






Normal Operation
The instrument cluster energizes circuit 53 (BK/LB) providing power to the interior lamps. The interior lamps are grounded through circuit 1205 (BK). The interior lamps remain lit until the instrument cluster removes voltage from circuit 53 (BK/LB).

Possible Causes
- instrument cluster
- bulb
- circuit 53 (BK/LB)
- circuit 1205 (BK)