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 B: Power Windows Completely Inoperative
- Check Window Operation - Operate passenger windows from driver's master power window switch. If windows operate, go to TEST C: ONE POWER WINDOW INOPERATIVE . If windows do not operate, go to next step.
- Check Light Blue/Black Wire - Disconnect driver door window switch connector. Turn ignition switch to RUN position. Using a voltmeter, check voltage between ground and driver door window switch connector Light Blue/Black wire. If battery voltage exists, go to step 4). If battery voltage does not exist, go to next step.
- Check Light Blue/Black Wire For Open Or Short To Ground - Disconnect instrument panel fuse block 27-pin connector C247. Using an ohmmeter, check resistance between ground and instrument panel fuse block connector C247 terminal No. 23 (Light Blue/Black wire). See Figure . If resistance is 10 k/ohms or less, repair short to ground in Light Blue/Black wire. Retest system operation. If resistance is more than 10 k/ohms, repair open in Light Blue/Black wire. Retest system operation.
- Check Ground Circuit - Using an ohmmeter, check resistance between ground and driver door window switch connector Black wire terminal. If resistance is 5 ohms or less, replace window switch and retest system operation. If resistance is more than 5 ohms, repair open in Black wire 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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