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.
1998 Ford Taurus SHOFACTORY OEM SERVICE PROCEDURE
Test C: One Power Window Inoperative
- Determine Inoperative Window - Determine inoperative window. Test inoperative window switch. See MASTER SWITCH or SINGLE SWITCH under COMPONENT TESTING. Replace switch if necessary. If switch is okay, reinstall switch and go to next step.
- Check Power To Motor - Disconnect window motor harness connector for inoperative window. Connect a test light or voltmeter between suspect window motor harness connector terminals. Turn ignition switch to RUN position and operate master switch up and down for inoperative window. If battery voltage does not exist, go to next step. If battery voltage exists, ensure window tracks and mechanisms are not causing window to bind and repair if necessary. If window is not binding, replace window motor and retest system operation.
- Check Motor Circuit Continuity - Remove single window switch for inoperative window. Check resistance of circuits between inoperative window motor and single switch. For wire color identification, see WIRING DIAGRAMS . If resistance is 5 ohms or less, go to next step. If resistance is more than 5 ohms, repair open in appropriate circuit and retest system operation.
- Switch Circuit Continuity - Remove power window master switch. Check resistance of circuits between single switch for inoperative window and master switch. For wire color identification, see WIRING DIAGRAMS . If resistance is 5 ohms or less, replace single switch. If resistance is more than 5 ohms, repair open in appropriate circuit and retest system operation.
Factory Service Tools
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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.
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