1. Check the Power Window Switch:
- Inspect the power window switch for any visible damage or cracks.
- Try operating the window using the switch several times to see if it makes a difference.
2. Examine the Window Motor:
- Remove the door panel to access the window motor.
- Check the motor for any signs of damage or corrosion.
- Try connecting the motor directly to a power source to see if it works properly.
3. Inspect the Window Regulator:
- The window regulator is responsible for raising and lowering the window. Check the regulator for any signs of damage, such as bent or broken components.
- Test the regulator by manually moving the window up and down.
4. Test the Window Relay:
- The window relay is responsible for controlling the flow of power to the window motor. Locate the relay and check for any signs of damage or corrosion.
- Swap the relay with a known working one to see if it resolves the issue.
5. Check Wiring Connections:
- Inspect the wiring connections related to the power windows for any loose, damaged, or corroded wires.
- Clean the connections and ensure they are secure.
6. Test the Window Circuit:
- Use a multimeter to test the continuity of the power window circuit. Check for any breaks or shorts in the wiring.
7. Consult a Repair Manual:
- Refer to a repair manual or wiring diagram specific to your 1990 Chrysler New Yorker for detailed instructions and troubleshooting steps related to the power windows.
8. Seek Professional Help:
- If you are unable to identify and resolve the issue by following these steps, consider seeking assistance from a qualified mechanic or auto electrician who can diagnose and repair the problem.
