I got a 88' e30 conv. My PW's for the most part roll down fine. Its on the roll up that I get a "stop and go" action. I have to press some of the buttons more then once to get them up; some worse then others.
To correct this situation were should I target......I opened the door panels and there is nothing physicaly wrong which is leading me to believe it's a electrical problem with the buttons.
Help me my freinds please!