I've got a customers car in for some WVO conversion updates and his windows now will not roll up or down. Passenger side rear window is in the down position and won't go up and while driving causes a deafening buffeting sound.

The windows have been sporadic since I've had the vehicle and seems to be temperature related, as when it is hot they will not roll up/down.

I had the fortune of checking the windows one day and they actually worked only the passenger rear window regulator cable mechanism decided to give up and a pulley broke. I replaced that and now I can not roll up the window and the customer is coming to pick up the vehicle.

Is there a way to "hot wire" the motor to get the window to roll up?

Car?

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83 SD

84 CD

year and model always helps

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1986 300SDL, 211K,Dealership serviced its whole life
1991 190E 2.6(120k)
1983 300D(300k)
1977 300D(211k)

DOH! 99 E300td