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Home >> Lincoln >> 2003 >> LS V8-3.9L VIN A >> Repair and Diagnosis >> Wiper and Washer Systems >> Testing and Inspection >> Pinpoint Tests >> Test V
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Test V

PINPOINT TEST V: THE WASHER PUMP IS INOPERATIVE


Test V1:






Test V2-V4:






Test V5-V8:






Normal Operation
The multifunction switch sends a reference signal through circuit 8-KA7 (WH/VT) to the wiper motor module (internal), the wiper motor will in turn send battery voltage through circuit 75S-KA7 (YE/VT) to activate the washer pump motor.

Possible Causes
- circuit 8-KA7 (WH/VT) open
- circuit 31-KA7 (BK) open
- circuit 31-KA19 (BK/RD) open
- circuit 75S-KA7 (YE/VT) open
- wiper motor
- multifunction switch
- washer pump motor
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