The sunroof on our 93 854 GLT will not close completely. It moves freely backward and forward. However, when the glass needs to raise up into the opening for it to close, it stops moving. I have seen the repair info on Volvospeed/Bay 13 but it doesn't help. The unit can't go to the vent position until after it has gone to the closed position.

I have another complete working unit from a 95 854 GLT but I had hoped I wouldn't have to remove the entire unit from the 93 also. Getting the unit out was a little difficult but we didn't have to worry about damaging the donor car. Does anyone know how the motor is operated by the control unit? I was wondering if it sensed the higher current draw when the motor met resistance? Could it possibly be that it relies on the number of times the spinning cables make its' gear move to determine the distance the glass has moved?

Any input would be appreciated.

TIA

Don

93 & 95 854 GLT & 95 855T > 530K miles & still counting & soon, a 2004 1/2 S40 with 25K
85 & 86 245's = 450K miles: RIP