1. Check the Fuse: This is the easiest and most common cause. Consult your owner's manual to locate the fuse for the power windows. Check the fuse visually for a blown element (a broken wire inside). Replace it with a fuse of the same amperage if necessary.
2. Check the Switch: The window switch itself could be faulty. Try the following:
* Test other windows: Do the other power windows work? If they don't, the problem is likely with the power source (fuse, wiring, etc.) and not just the single switch.
* Try the switch in a different position: Sometimes dirt or debris can interfere. Try cleaning the switch with compressed air or a contact cleaner (specifically designed for electronics).
* Test with another switch (if possible): If you can borrow a switch from another Mustang (same year and model are ideal), swap them to isolate the problem. If the problem moves to the other door, the switch is the culprit.
3. Check the Wiring: This is more involved and may require some electrical knowledge.
* Look for broken or frayed wires: Inspect the wiring harness running from the switch to the window regulator motor. Pay close attention to areas where the wiring might bend or rub against the door frame. A visual inspection can often reveal a broken or frayed wire.
* Check the window regulator connector: Make sure the connector at the window motor is securely connected and not corroded.
4. Check the Window Regulator Motor: If the fuse, switch, and wiring all check out, the window regulator motor itself may be failing. This is the least likely cause if you're only hearing a click, but it's a possibility. Accessing the regulator usually involves removing the door panel. You might be able to test the motor directly with a multimeter (requires electrical knowledge) to see if it's receiving power.
5. Power Problems: While less common, ensure the battery is adequately charged and there's no issue with the vehicle's electrical system.
Important Considerations:
* Safety First: Disconnect the negative battery terminal before working with any electrical components to prevent accidental short circuits.
* Door Panel Removal: Removing the door panel can be tricky. Online tutorials (YouTube is a great resource) specific to your year and model Mustang are highly recommended. Be careful not to damage any clips or fasteners.
* Professional Help: If you're not comfortable working on car electrical systems, it's best to take your Mustang to a qualified mechanic. Incorrect wiring could cause further damage.
Start with the easiest steps (fuse check) and work your way down. The clicking sound strongly indicates a power issue before a motor issue. Good luck!
