well, start by removing the seat... ha, ha, ha,... say a few magic words, wipe out the shoulders on at least one bolt in the process, go inside and cool off, come back, finally remove the other seat to see how to remove the first seat, then, if you're lucky, remove the seat with the problem, stop and go inside and put some bandaids on your skinned knuckles, try to stop the bleeding from stabbing yourself with a small screwdriver, look at the wires, try to disconnect the stupid plastic connection blocks, note which wires you have just damaged from the above steps, try to fix the damaged wires with your soldering iron and/or crimp-on connectors, plug everything in with the seat removed from the track. Now comes the important part... note which feature does not work when you trigger the controls..., for good measure, take a few pictures of the whole thing (opps, do this step at the very first before you break a few things, consult your Haynes service book (yeah, that will help!), go online for about 3 hours looking for help... then, maybe then, you will stumble across something helpful that will allow you to at least determine what the problem really is, take a couple of days of to let your hand injuries heal a bit, then, once fixed, try to remember how the whole thing does back together; by the way, don't forget to clean under the seat, removing any stray French fries, coins, gum wrappers, etc. Now hop up in the seat, cross your fingers, say a prayer... and everything should work out just fine. If not, repeat the above steps, but... no, wait... make peace with the fact that the seat is fine just the way it was; talk to an old timer who can retell how things were just fine back in the old days when seats would travel fore and aft and that's it... and no electrically, but by hand.
Mark