* Power Window Master Switch: This is the most frequent cause. The master switch (usually located on the driver's side door) controls all the windows. A faulty switch can interrupt power to the entire system. Try testing the individual window switches on the other doors to see if they work, though this is often difficult without power to them.
* Fuses or Relays: Check the fuse box (usually under the hood and inside the cabin) for blown fuses related to the power windows. Also, look for relays – small, square components that click – that might have failed. Consult your owner's manual to identify the correct fuses and relays for the power windows.
* Wiring Harness: A damaged or corroded wire in the main wiring harness running from the master switch to the other doors could cut off power. This is particularly likely in areas subject to wear and tear, like the flexible sections near the door hinges. Inspect the harness carefully for any cuts, fraying, or corrosion.
* Power Window Control Module (PWM): Some Ford Explorers use a separate module to control the power windows. A malfunctioning PWM would disable all the windows. This is less common than fuse/relay or switch problems but is possible.
* Low Battery Voltage: A weak battery might not supply enough power to operate the windows, especially if other electrical systems are also drawing a lot of power. Check the battery voltage with a multimeter.
* Ground Connection: A poor ground connection somewhere in the system could prevent the windows from working correctly. This often requires a more detailed electrical diagnostic.
Troubleshooting Steps:
1. Check the fuses and relays: This is the easiest and quickest first step.
2. Test the individual window switches: If only the master switch is not working, replace it.
3. Inspect the wiring harness: Look for obvious damage.
4. Check the battery voltage: Ensure it's within the normal range.
If none of these steps solve the problem, you'll likely need to consult a qualified automotive electrician or mechanic to diagnose the issue. They have the tools and expertise to test the PWM and other more complex electrical components. They can also check for more subtle problems like corroded connections or poor grounds.
