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.
2003 Lexus LS 430FACTORY OEM SERVICE PROCEDURE
Motor Operation
WARNING: This page is about a different car, the 2002 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
- Remove door panel for access to suspect power window motor. See Figure. On driver door, disconnect 6-pin electrical harness connector from power window motor. On front passenger and both rear doors, disconnect 2-pin electrical harness connector from power window motor.
- Using jumper wires, apply battery voltage and ground to power window motor terminals No. 1 and 2 and check that power window motor rotates clockwise. See STEP 1 of Fig 1.
- Reverse jumper wires so polarity is reversed and check that power window motor rotates counterclockwise. See STEP 2 of Fig 1. Replace power window motor if operation is not as specified.
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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