I have a 940 Haynes covering the 1990 to 1996 years, but the electrical diagram may be incorrect. The diagram shows a no. 242 stop switch, but I don't see any stop switch on my 1995 940. Also, the plastic behind the fuse panel lists fuse no. 3, a 30 amp fuse, as the one for the power seat and the Haynes says no. 3 is a 15 amp fuse. The fuse (no. 3)is okay. The connectors on the module under the seat seem to be plugged in correctly. The car is in storage and hasn't been used for about a year. My wife last adjusted the seats all the way forward a couple months ago and wasn't sure whether she used the memory switch or the adjustment switches. The car is low miles (62K) and extremely clean, even under the seat, so I doubt dirt or worn switches are the culprit. Any ideas before taking the seat out? Is there a stop switch I don't know about? How do I get the cover off to get at the microswitches? Thanks.

Check the connections on the plug under the carpet. When the seat on my '93 945 stopped working, it turned out that the power lead in the plug was corroded. I had the "popular" water leak at the vent to the left of the driver's feet. The water would pool under the carpet, soaking the plug. Eventually, the connection oxidized enough to cut off the power all together. To fix it, I cut the power (red) wires before and after the plug, then connected them independently. (of course I fixed the water leak too)

You can check it without cutting the wires by using a piece of wire to "jump" around the plug, and see if you get power that way.

Good luck.

Jeff Pierce
--
'92 Mercedes 190E (my daily driver), '93 Volvo Turbo Wagon (a family car w/flair), '53 Willys-Overland Pickup (my snow-plow truck/conversation piece)

Jeff,
You led me in the right direction. There was no power getting to the connector you mentioned, the main power via the black and white wire. I re-seated the other end, on the fuse block fuse no. 3, and everything was okay. I wonder if the friction type connection on the fuse block was loose??? I also used dielectric grease on the connectors you mentioned and wrapped them in electrical tape for a waterproof connection.
Thanks - Glen