It always seems around this time of year we run into issues with windows. They won’t come up, they won’t go down, and there could be other issues on the vehicle. So how do you diagnose these to make sure that either it’s the motor, the regulator, or even clips inside the window? Well, you need to diagnose the entire system.

First off, make sure you can connect the scan tool and observe if the window is being actuated by the switch. If you cannot see on the data stream the window going up and down or the switch making a difference, it might be the switch. If you see the switch working, but the window is not going up and down, it could be the motor or other issues with the electoral going to it. We still haven’t removed the door panel yet, but we need a little bit more information to ensure that the motor’s working properly.

This is where current comes in. If you have an amp clamp or current probe, you can use this to connect it to the power line going to the motor in the window. This way you can look at the actuation of the window. Also, you can observe certain changes in current that could be a busted clip, issues with the tracks, or other things with the weather stripping by increase current load on the circuit. This way you know that when you order that window regulator, it’s going to fix the problem.

My number three tip, it’s pretty common sense, but look at the service information. The service information when it comes to window regulators and window motors, it’s pretty complete and there’s going to be certain tricks and tips to remove the regulator or motor the easiest way possible. It could be the removal of a speaker in the door. It could be the removal of certain access panels to get to the window regulator and the bolts that hold it in. This way by looking at the service information, you won’t get stuck with the surprise when trying to put the door back together. I’m Andrew Markel. Thank you very much.

This video is sponsored by Auto Value and Bumper to Bumper.