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psychoman 08-30-2003 07:42 AM

Power seat problem
 
Someone was sitting in passenger seat decided to play with seat.
Now back is stuck leaning forward. Switch tests good. Is there any way to manually move the seat to a more comfortable position. All other directions work. Does not make any noise. Will wait for reply before i take it apart. Thanks

Old Deis 08-30-2003 01:21 PM

Without getting in there and unplgging the seat connection and then figuring out which wire goes where, I don't know how one would get that done.
However, I have had the seat switch gremlins for some time and there are a few things to try to get something to work there. I am not a person that understands electrical stuff, but that seat switch can be made to work sometimes.
First thing is there ant function that does work?
If not then check the fuse.
If most functions work, but one doesn't, then either an internal part is damaged, or sometimes it is a ground screwup. Try the seat with the key off, then try it with the key on. Try it with engine running, then engine off. Open the door and fiddle with those two door switches. They are somehow on the circuit and can cause the switch to act up a times. ON mine if the seat doesn't work right I have to shut the car off and open the door to get it to move. Just wierd I guess.
Maybe it will work for you?

sixto 08-30-2003 03:09 PM

How do you know the switch is good - you tried it in another car or you checked continuity? If you checked continuity then you know the pin-outs. Jump the corresponding pins in the socket and see if that does it. If you tried it in another car, try the other car's switch in this car (I'm grasping now). Give the switch a good spritz of Caig Deoxit to clean it.

If nothing works, raise the seat as much as it will go. You'll see a bunch of motors under the seat. It's easy to identify which motor does what by having someone tap the switches while you feel for which one's vibrating. Make sure your second pair of hands knows to only tap the switches because there's a lot of finger crushing torque at the end of those reduction gears.

Pull the bum motor and see if it's a bum because it's dead or because the mechanism's stuck. If it's dead, bury it. If the mechanism's stuck, see if you can free it. It gets even more generic at this point because I don't know if the reclining mechanism has a straight gear drive or a cable drive and if it's possible for the mechanism to jump its rack at the extremes of travel. So many possibilities but it's pretty obvious how the mechanisms work once you see it.

Probably just a dirty switch or bad connector :)

Hope this helps.

Sixto
95 S420
91 300SE
87 300SDL
83 300SD


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