1990 SL Passenger Seat will not move
 

Seat backrest is the only position that can be adjusted. I believe the unit in the door is working.
Checked mirrors and they work, Fuse is not blown in trunk, driver seat works ok in all positions. Don't know where relay is located as some talk on this form about cold solder joints. Anyone know the location of this. I find it highly unlikely that all positions except for back of the seat will not operate. Anyone out there have any ideas they would be greatly appreicated.

boatjocky1@hotmail.com