Washer Pump Test
WARNING: This page is about a different car, the 1997 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
- If washer does not operate, ensure reservoir is full. Operate washer switch. If washer pump is inoperative, go to next step. If washer pump operates but fluid does not squirt from nozzles, inspect pump, nozzles and hoses for blockage. Repair as necessary. If pump squirts fluid but wipers do not wipe, go to step 7).
- Turn ignition on. Check for battery voltage on Black/White wire at washer pump while operating washer switch. If battery voltage exists, go to next step. If battery voltage does not exist, go to step 4).
- Check Black wire for resistance between ground and washer pump connector. If resistance is greater than 5 ohms, repair open Black wire. If resistance is 5 ohms or less, replace washer pump and retest system.
- Check windshield wiper operation. If wipers operate, go to next step. If wipers do not operate, see WIPERS INOPERATIVE AT HIGH SPEED .
- Unplug Wiper Control Module (WCM) connector. Press and hold washer switch. Measure resistance between Brown/White and Dark Blue/White wires at WCM connector. If resistance is greater than 5 ohms, go to next step. If resistance is 5 ohms or less, go to step 7).
- Unplug wiper switch connector. Press washer switch. Measure resistance between terminals No. 4 and 6 at wiper switch. See Figure . If resistance is 5 ohms or less, repair open in Brown/White and Dark Blue/White wire(s) between WCM and wiper switch. If resistance is greater than 5 ohms, replace wiper switch and retest system.
- Measure resistance of Black/White wire between WCM and washer pump connectors. If resistance is greater than 5 ohms, repair open Black/White wire and retest system. If resistance is 5 ohms or less, replace WCM and retest system.