Tips on Troubleshooting the Lincoln Town Car Window Regulator
Your Lincoln Town Car's window regulators are usually built to last, but due to frequent use, they eventually lose grip and cause your power windows to get stuck or be completely useless. Finding the cause of the problem is a bit difficult since you have to remove the door panels before you can inspect the window motor and regulator. But once you've reached that far, you can follow these tips on how you can determine the root cause of your defective windows:
When suddenly your window doesn't work, all you need is a digital multimeter. You need to check whether the problem is caused by the window regulator or the switch. Connect the red and black tips to the wire of the regulator motor and the window wiring connector. Turn the ignition key to "RUN" position. Raise and lower the window until you get a reading. If the reading is between +12 volts and -12 volts, then the problem is the window regulator and not the switch. You can also check the fuse box for any blown fuse, since the window regulators are high-current devices and the fuse box may have reached its threshold.
It is inevitable that sooner or later the window regulators will fail you. Either the window will go down, but not go up. When this happens, you can conduct the same test using the multimeter. Again, if the reading toggles between +12 volts and -12 volts, then you should check your window regulator for damage. If there is no reading from the instrument, then it could be due to a bad switch or a broken wire. Replace the defective switch or wire immediately.
Isn't it awkward that at the time you need to open your window the most, it randomly gets stuck? When this happens, the window regulator does not have enough lubrication to operate smoothly. What you can do is oil the regulator with a silicone spray. However, if it still won't work, then you can further inspect for damages or worn-out parts in the window assembly that you have to replace.