Chrysler Repair: 91 Le Baron Eletric Seat, chrysler le baron, surface contamination

Question
How do I find out how to fix the electric seat on the drivers side. The seat will go back, but it will not go forward. Vehicle is a 91 Chrysler Le Baron Convertable. The electric door lock do not work also. The electric windows work fine, and the tilt mechinism also works on the seat...It just won't go back.

Answer
Hi Kate,
On the power seat, there is only one motor for each motion, so the fore and aft motor is working, the problem is in the switch that controls the motor. I would remove it from the door mounting (I suspect it lifts out with a knife blade around the edge of it) and then using a can of spray contact cleaner try shooting a spray inside the switch to see if you can possibly clean off some surface contamination that is prerventing the switch from reversing the polarity of the voltage on the seat motor. The wires that move the motor are yellow/light blue and red/light blue and so another way to verify that the motor is o.k. is to jump the 12v from the battery posts directly to the those wires and depending upon which one has the + and which the - the motor will go either forward or back. You can get the two battery post sources right at the switch, on the red and the black wires, so just jump them (Black to yellow/light blue and Red to red/light blue which should cause the seat to go foraward,  and then reverse them and if it drives the seat backward, then you know it is an internal switch problem. I don't know if the switch can be opened but if it can and the spray doesn't help, then try opening the switch and looking at the contacts that the switch causes to close to see if any of them are oxidized or corroded. You could clean them with a small file.
Always have the ignition off when you are dealing with the wires until you have the jumpers in place, then get power by turning the switch to the run position.
On the door locks, there is one relay in the relay bank located to the left of the driver's left shin (above the kick panel on what is called the cowl) where you will find an array of relays. The 3rd one from the front in the 2nd row is the auto door lock relay. (the 4th from the front should be empty). See if any of the other relays in the bank have the same part number, and if so try trading their positions. See if the door locks now work. If so, then the relay is bad and needs to be replaced. If they still don't work then some more circuit analysis will be needed.
But let me know your progress.
Roland