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Home >> Ford >> 2008 >> Mustang V8-5.4L SC >> Repair and Diagnosis >> Wiper and Washer Systems >> Testing and Inspection >> Pinpoint Tests >> Test E: The Washer Pump Is Inoperative
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Test E: The Washer Pump Is Inoperative

PINPOINT TEST E: THE WASHER PUMP IS INOPERATIVE

Normal Operation
When activated, the windshield wiper/washer switch sends a ground signal through circuit 680 (LB/OG) to the windshield wiper motor. The windshield wiper motor then supplies voltage through circuit 941 (BK/WH) to activate the windshield washer pump motor. Ground is provided to the windshield washer pump through circuit 1205 (BK).

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Windshield wiper motor
- Windshield washer pump


E1-E3:






E4-E6:




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