* Broken Window Regulator: This is the most likely culprit. The regulator is the mechanical system that raises and lowers the window. It's made of cables, gears, and a motor. Over time, these parts can wear out, break, or become jammed. This is especially common on older cars. A broken cable is often the cause of the window not moving manually.
* Window Motor Failure: The motor is what powers the regulator. If the motor is burnt out or seized, the window won't move at all.
* Faulty Window Switch: While less likely given that it won't move manually, a completely failed window switch could prevent power from reaching the motor and regulator even when trying to manually crank the window. However, most switch failures will at least provide some inconsistent function, rather than complete inaction.
* Wiring Issues: A break or short in the wiring harness leading to the window motor or regulator could interrupt power. This could be anywhere from the switch to the motor itself. Check the wiring carefully for damage, corrosion, or loose connections.
* Broken or Jammed Window Mechanism: Something might be physically blocking the window from moving. Check for any obstructions within the window track or the window itself.
* Fuse (less likely given manual failure): While less probable because it's not moving manually, a blown fuse could still be a possibility. Check your owner's manual for the location of the window fuse and check its condition.
Troubleshooting Steps:
1. Check the fuse: Start with the simplest thing first – check the fuse.
2. Inspect the wiring: Visually inspect the wiring harness for any obvious damage, especially near the door jamb where it flexes a lot.
3. Listen for the motor: Try operating the switch. Do you hear any clicking or whirring from the door? If not, the motor or regulator might be the problem.
4. Manual Crank Test: If you have an access point to manually crank the window regulator (sometimes found by removing the door panel), this can isolate the issue. If it doesn't move manually, the problem is likely in the regulator or a mechanical blockage.
5. Remove the door panel: This will allow you to visually inspect the window regulator and motor for any obvious problems. You'll likely need to consult a repair manual or online videos specific to your 1994 Crown Victoria for guidance on this step.
Unfortunately, repairing a broken window regulator often requires replacing the entire assembly, which can be moderately difficult and potentially expensive. If you're not comfortable working on your car, it's best to take it to a mechanic for diagnosis and repair.
