Hey guys, this is kind of a strange problem that I haven't found anything like it on google which is strange since almost everything is covered. Whenever I roll up my windows and they get to the top where they can't go any further my car's rpms stumble (drop to about 750-800 then back up to 900ish). It doesn't happen when the window is going up, just when it finishes and reaches the top which leads me to believe its not the alternator or battery (voltometer reads 14V). Also, when the car stumbled the headlights do not dim or the music get quieter which makes me think it's not the alternator. Idk, any ideas?

 

Mine does the same thing fwiw...Never really bothered me. It seems like it just puts a load on the alternator which causes the idle to stumble a bit.

 

But if it had to do with the alternator wouldn't it happen when you first started rolling up the windows or all the way up?

 

Does it stumble when rolling up each window? All together? One at a time?

It sounds like the motor might be trying to roll the window up past the physical limit and is creating an excessive power draw.

 

Happens everytime you roll up any window, If the windows take more power trying to roll up past the limit than that's the answer. Thanks!