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 MANUALSFORD1991PROBE GL, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTWIPER/WASHER SYSTEMSTESTINGFRONT WIPER TESTACCESSORY RELAY TEST
1991 Ford Probe GL, Standard
Accessory Relay Test
1991 Ford Probe GL, StandardSECTION Accessory Relay Test
- Turn ignition on. Set W/W switch in OFF position. Connect voltmeter between ground and Black wire terminal of accessory relay connector. If voltage is 11-13 volts, go to step 2). If voltage is not 11-13 volts, replace accessory relay.
- Disconnect accessory relay connector. Connect ohmmeter between ground and Black wire terminal of accessory relay connector. If continuity exists, go to step 3). If continuity does not exist, repair open condition in Black wire between accessory relay and ground.
- Reconnect accessory relay connector. Connect voltmeter between ground and Blue wire terminal of accessory relay connector. If voltage is 11-13 volts, go to ACCESSORY RELAY-TO-INTERVAL GOVERNOR SUPPLY TEST. If voltage is not 11-13 volts, replace accessory relay.
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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.