To diagnose and fix this, you should follow these steps:
1. Identify the symptoms: Are *only* the mirrors not working? Or are other electrical components also malfunctioning (power windows, locks, heated mirrors)? This will help you narrow down the potential problem.
2. Locate your owner's manual: Your owner's manual will have a fuse box diagram showing which fuse(s) control the power windows, locks, and mirrors. The specific fuse number varies by year and model.
3. Locate the fuse boxes: The Cherokee Liberty typically has two fuse boxes: one under the hood and one inside the cabin (often under the dashboard on the driver's side).
4. Inspect the fuses: Carefully examine the fuses listed in your owner's manual as potentially controlling the power mirrors. Look for a blown fuse. A blown fuse will usually have a broken filament visible through the clear plastic.
5. Replace the blown fuse (if found): If you find a blown fuse, replace it with a fuse of the same amperage. Never replace a fuse with one of a higher amperage; this is a fire hazard. You can usually find replacement fuses at auto parts stores or even some convenience stores.
6. Test the mirrors: After replacing the fuse, check if the mirrors are working again.
If replacing the fuse doesn't solve the problem:
* Check the mirror switches: Make sure the switches themselves aren't faulty. Try adjusting the mirrors manually (if applicable).
* Check the mirror wiring: There may be a break or short in the wiring harness leading to the mirrors. This requires more advanced troubleshooting and potentially professional help.
* Check the mirror motors: The motor in one or both mirrors might have failed. This usually requires replacing the mirror assembly.
Important Note: If you are uncomfortable working with car electronics, it's best to take your Jeep to a qualified mechanic. Improperly dealing with electrical systems can be dangerous.