When I lower the driver side rear window in my quad, and release the button half way down, it doesnt stop for about 1 sec and keeps lowering. i guess you could call it overrun? All other windows are fine and stop on a dime.

What is it? Motor? Switch?

 

switch or relay i would think. maybe the motor also.

 

I'd guess a sticky switch. Does it feel like the switch doesn't return to neutral?

 

The extra length of wire run to the back of the truck from the front drivers switch, causes a delay in the turning off of the power
Al.

 

no not really. I do have a problem with the window lock button. Sometimes the windows lock for no reason, and I have to reset the button

 

try resetting the trucks computer