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.
Circuit/System Verification
- Ignition ON.
- Verify the driver window functions while commanding the Driver Window Motor Up and Down with a scan tool.
- If the driver window does not move UP and DOWN as commanded
Refer to Circuit/System Testing - Driver/Passenger Window Motor Malfunction.
- If the driver window moves UP and DOWN as commanded
- If the driver window does not move UP and DOWN as commanded
- Verify the driver window moves while commanding the window UP, express UP, DOWN and express DOWN with the S79D Window Switch-Driver.
- If the driver window does not move UP or DOWN as commanded
Refer to Circuit/System Testing - Driver Window Switch Malfunction.
- If the driver window does not express UP or express DOWN
Normalize the driver window motor, refer to Window Motor Programming - Express Function .
- If after normalization, the driver window does not express UP or express DOWN
Refer to Circuit/System Testing - Driver Window Switch Malfunction.
- If the driver window moves UP, express UP, DOWN and express DOWN as commanded
- If the driver window does not move UP or DOWN as commanded
- Verify the scan tool parameters listed below change when pressing and pulling the switches for the passenger window on the driver window master control;
- Front Passenger Main Control Down Switch - Inactive and Active
- Front Passenger Main Control Express Switch - Inactive and Active
- Front Passenger Main Control Up Switch - Inactive and Active
- If the parameters do not change
Refer to Circuit/System Testing - Driver Window Switch Malfunction.
- If the parameters changes
- Verify the passenger window moves while commanding the Passenger Window Motor Up and Down with a scan tool.
- If the passenger window does not move UP and DOWN as commanded
Refer to Circuit/System Testing - Driver/Passenger Window Motor Malfunction.
- If the passenger window moves UP and DOWN as commanded
- If the passenger window does not move UP and DOWN as commanded
- Verify the passenger window moves while commanding the window UP, express UP, DOWN and express DOWN with the S79P Window Switch-Passenger.
- If the passenger window does not move UP or DOWN as commanded
Refer to Circuit/System Testing - Passenger Window Switch Malfunction.
- If the passenger window does not express UP or express DOWN
Normalize the passenger window motor, refer to Window Motor Programming - Express Function .
- If after normalization, the passenger window does not express UP or express DOWN
Refer to Circuit/System Testing - Passenger Window Switch Malfunction.
- If the passenger window moves UP, express UP, DOWN and express DOWN as commanded
- If the passenger window does not move UP or DOWN as commanded
- All OK.
NO RELATED
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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.