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 151 (WIPER/WASHER SYSTEM - REAR)TESTINGWIPER/WASHER SWITCH TEST
1991 Mercury Tracer Base, 4D Sedan, Automatic
Wiper/Washer Switch Test
1991 Mercury Tracer Base, 4D Sedan, AutomaticSECTION Wiper/Washer Switch Test
WARNING: This page is about a different car, the 1994 Ford Probe. However, it is still accessible from the selected car via links, so may be relevant.
- Unplug connector from rear wiper switch. With switch in ON position, continuity should exist between terminals for Black/Blue and Black wires. Continuity should not exist with switch in OFF position. Replace switch if continuity is not as specified.
- Unplug connector from rear washer switch. With switch in ON position, continuity should exist between terminals for Blue/Yellow and Black wires. Continuity should not exist with switch in OFF position. Replace switch if continuity is not as specified.
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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.