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.
1997 Isuzu Trooper LSFACTORY OEM SERVICE PROCEDURE
Left Front
- Turn ignition off. Remove left front power window switch from door trim panel. Disconnect power window switch harness connectors. Turn ignition on. Using a voltmeter, check voltage between harness connector "A", terminal No. 7 (Blue/Black wire) and ground, then terminal No. 10 (Light Green/White wire) and ground. See Figure and Figure . Battery voltage should be present at each terminal.
- Turn ignition off. Using an ohmmeter, check for continuity between harness connector "A", terminal No. 1 (Black wire) and ground. Continuity should be present. Check for continuity between harness connector "A", terminals No. 5 (Blue/White wire) and No. 6 (Blue wire). Continuity should be present.
- Check for continuity between harness connector "B", terminal No. 5 (Red/Yellow wire) and ground. SeeFigure and Figure . Continuity should be present.
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.