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If the window will go down but up Is it motor?

If a window goes down but not up, it's *likely* a problem with the window motor, but not definitively. Other possibilities include:

* Broken regulator: The regulator is the mechanical part that connects the motor to the window. A broken regulator can prevent the window from going up even if the motor is working.

* Wiring issues: A short or broken wire could prevent the motor from receiving the signal to go up.

* Switch problem: The switch that controls the window might be faulty, only sending the signal to go down.

* Binding window: Something might be jamming the window from going up, such as debris or a malfunctioning track.

While the motor is a strong suspect, you should investigate these other potential problems before assuming it needs replacement.