D- Single Mirror Inoperative
Pinpoint Test D: Single Mirror InoperativeD1 - Check Mirror Up/Down Operation
- Remove outside Rear View Mirror Glass Town Car or Crown Victoria/Grand Marquis from inoperative outside rear view mirror as outlined.
- Carefully probe wires and connect test lamp between up/down circuits:
Press mirror buttons.
Driver Mirror 541 (DB), 542 (Y)
Passenger Mirror 544 (P), 545 (W)
Did test lamp illuminate when the mirror buttons were pressed?
YES GO to D2.
NO GO to D3.
D2 - Check Mirror Left/Right Operation
- Connect test lamp between left/right circuits:
Driver Mirror 540 (R), 542 (Y)
Passenger Mirror 543 (DG), 545 (W)
Did test lamp illuminate?
YES REPLACE motor assembly. RESTORE vehicle. RETEST system.
NO GO to D3.
D3 - Check Suspect Circuit For Voltage
- Remove front door trim panel as outlined.
- Disconnect outside rear view mirror harness connector.
- Connect test lamp between suspect circuit and a known good ground.
- Actuate outside rear view mirror control in inoperative direction.
Did test lamp illuminate?
YES REPLACE outside rear view mirror wiring harness. RESTORE vehicle. RETEST system.
NO SERVICE suspect circuit from front door to outside rear view mirror control. RESTORE vehicle. RETEST system.