Is there a diagram for power seat mechanism on 1996 960 Volvo?

Answer 1

Yes, there is. But I bet you are asking about why the power seat only works on or moves forward or backward on one side. The answer is that there is a cable that goes from the motor (under the seat) to the gears on the side/s. Inside the cable there is a wire. The wire is round in the middle and square on the ends. It is a flexible wire that fits into a receptor cog that turns the gears to advance forward and backward. Guess what, with age, the ends that are square strip and become rounder. So you need to replace the receptor cog and the wire. You will need to go to the dealer for those parts. To replace you need to take out the entire seat. It is not accessible while bolted in.