The window regulator of a vehicle allows you to lower or raise the windows at ease and at your own convenience. If this gets broken, it will negatively affect the performance of the glass windows, making it hard for you to control them. In the long run, it's inevitable for the regulator to get damaged, especially when proper maintenance is not done. Here are some signs and symptoms to tell if the Cadillac Deville window regulator has gone from good to bad.
One of the most obvious indications to know that there's something wrong with the window regulator is if the glass windows refuse to go up and down whenever you try to work them. If this happens, it's likely that there's a blown fuse or connection break in the regulator motor. You can just simply adjust this without necessarily replacing it. Take note that if most of the windows don't function, then replacing the regulator motor may be required.
As you control the windows of your vehicle, try to listen to the sounds that it makes. If you hear different noises, then it's a sign that the window regulator is about to go south. Try to move the raised windows and assess if you hear the regulator motor sound; if you do, then that's because of a motor that's out of alignment. If not, you'll have to get the whole window regulator replaced with a new one.
Take a good look at the joints of the window regulator if there's rust or stiff movement and if the electrical system is operating as it should. It's possible that the joints could break or corrode, which causes the windows to stop working. You can fix this by taking out the window regulator from the door panel and installing a new one so that it can work properly again.
Examine the wiring harness from the fuse panel to the switches and from the switches of the window regulator. If there's a broken or short harness, then you'll have to visit a professional mechanic to get this replaced with a new one.