Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY1991TRACER BASE, 4D SEDAN, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 148 (WIPER/WASHER SYSTEM - FRONT)TESTINGWIPERS INOPERATIVE
1991 Mercury Tracer Base, 4D Sedan, Automatic
Wipers Inoperative
1991 Mercury Tracer Base, 4D Sedan, AutomaticSECTION Wipers Inoperative
WARNING: This page is about a different car, the 1994 Mercury Tracer and 1994 Ford Escort. However, it is still accessible from the selected car via links, so may be relevant.
- Check wiper fuse. If fuse is blown, inspect Blue wire between fuse block and wiper switch, and between fuse block and wiper motor for short to ground. If wire is okay, replace fuse and go to next step. Repair Blue wire if it is shorted.
- Perform WIPER SWITCH TEST. If switch is okay, go to next step. Replace switch if defective.
- Perform WIPER MOTOR TEST. If motor is okay, go to next step. Replace motor if defective.
- Unplug 14-pin connector from wiper switch. Turn ignition on. Check for battery voltage at Blue wire at harness connector. If battery voltage exists, go to next step. If battery voltage does not exist, repair Blue wire to fuse block.
- Measure resistance between Black wire at harness connector and ground. If resistance is less than 5 ohms, go to next step. If resistance is not less than 5 ohms, repair Black wire to ground.
- Turn ignition off. Unplug wiper motor connectors. Turn ignition on. Check for battery voltage at Blue wire at harness connector. If battery voltage exists, repair Black wire(s) between wiper motor connector(s) and ground. If battery voltage does not exist, repair Blue wire to fuse block.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.