1. Check the Fuse: Start with the easiest fix. Consult your owner's manual to locate the fuse for the power windows. Check if it's blown and replace it with a fuse of the same amperage if necessary.
2. Window Switch: The switch itself might be faulty. Try these tests:
* Try the other windows: Do the other windows work? If not, the problem might be with the master switch or a more general electrical issue. If they *do* work, the problem is likely isolated to the passenger-side switch.
* Switch testing (advanced): You can try to test the switch's continuity with a multimeter (if you have one). This requires some electrical knowledge and caution. There are online resources showing how to test window switches; search for "[your car year and model] power window switch testing".
3. Window Regulator: The regulator is the mechanism that moves the window up and down. It's a fairly common point of failure. Problems with the regulator can include:
* Broken cables: The cables that connect the motor to the window may be broken or frayed. This often results in the window not moving at all, or moving erratically.
* Motor problems: The motor itself might be burned out or seized. You'll likely hear a clicking sound (if the motor is trying to engage) or nothing at all.
* Broken regulator components: Other parts within the regulator assembly could be damaged.
To access the regulator, you'll likely need to remove the door panel. There are many online tutorials available for your specific car model demonstrating how to do this. It's a somewhat involved process, so be prepared for some disassembly. Once accessed, you can visually inspect the cables and motor for damage.
4. Wiring: A broken or loose wire in the door harness is another possibility. This is harder to diagnose without a multimeter but can be inspected once the door panel is removed. Look for any obvious breaks, chafing, or corrosion in the wiring.
5. Power Window Motor: As mentioned above, the motor may have failed. Replacing the motor usually requires replacing the entire regulator assembly, as the motor is often integrated into it.
6. Grounding Issues: A poor ground connection can prevent the motor from receiving enough power. This is a less common cause but worth checking if other solutions fail.
Before You Begin:
* Disconnect the battery's negative terminal: This is crucial to prevent accidental short circuits while working with electrical components.
* Consult a Repair Manual: A repair manual specific to your 1987 Chrysler Fifth Avenue will provide detailed diagrams and instructions. This is highly recommended, especially for more involved repairs like replacing the regulator.
If you're not comfortable working on car electrical systems, it's best to take your vehicle to a qualified mechanic. Replacing the window regulator is a moderately difficult job, depending on your mechanical skills.
