1. Window Won't Go Up or Down:
* Check the Fuse: Consult your owner's manual to locate the power window fuse and check if it's blown. Replace it with a fuse of the same amperage if necessary.
* Window Switch: The switch itself might be faulty. Try the switch in a different window to test this. If it's the switch, you'll need to replace it.
* Window Regulator: This is the mechanism that moves the window. It's a common point of failure. The regulator can break, seize, or have its cables detach. This often requires removal of the door panel to access and repair or replace.
* Wiring: Check the wiring harness leading to the window motor and switch for any breaks, damage, or loose connections. This might require tracing the wires within the door.
* Window Motor: The motor itself might be burned out. This usually requires regulator replacement as they are often sold as a single unit.
2. Window is Stuck Partially Open or Closed:
* Obstructions: Check for any obstructions in the window track or preventing the window from moving freely. Clean the tracks and remove any debris.
* Regulator/Motor Problems (as above): A partially functioning regulator or motor could cause this.
3. Window Rattle or Noise:
* Loose Parts: Check for loose screws or bolts on the window itself or the door panel.
* Worn Track: The window tracks might be worn, causing the window to rattle. Lubricating the tracks with silicone-based lubricant might help temporarily. Replacement might be necessary eventually.
Repair Steps (General):
1. Consult a Repair Manual: A repair manual specific to your 1999 Ford F-150 will provide detailed diagrams and instructions. This is highly recommended.
2. Disconnect the Battery: Always disconnect the negative terminal before working on any electrical components.
3. Remove the Door Panel: This usually involves removing screws, clips, and possibly disconnecting some wiring connectors. Online videos for your specific year and model can be very helpful here.
4. Assess the Problem: Once the door panel is removed, you can visually inspect the regulator, motor, wiring, and window tracks to identify the problem.
5. Repair or Replace: Depending on your findings, you'll either repair the faulty component (if possible) or replace it with a new one. Parts can be obtained from auto parts stores or online retailers.
6. Reassemble: Carefully reassemble the door panel and reconnect the battery. Test the window to ensure it functions correctly.
Important Considerations:
* Difficulty Level: Repairing power window issues can range from simple (fuse replacement) to complex (regulator replacement). If you're not comfortable working on cars, it's best to take it to a professional mechanic.
* Parts Availability: Finding replacement parts for older vehicles might require some searching.
* Online Resources: YouTube videos and online forums dedicated to Ford F-150s are excellent resources for visual guidance and troubleshooting advice. Search specifically for your year and model.
Remember safety first. If you're unsure about any step, seek professional help.
