How can I fix a automatic front seat when one side does not move
How can I fix a automatic front seat when it does not go back and forth evenly? I see too many motors under the seat, but I How can I figure out which one is responsible or not working ? how do I know if motor is bad or the connections? How does this work? can you do a drawing? I have 740i 1994 bmw
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Pull the handle as if the seat were installed and you were going to move it forward or back. They will slid back and forth on the seat so you can align the holes. set both sides even once you get the correct line up. After you put in front or rear 2 bolts then slide seat to install the other 2. Hope this helps Mike
if it sounds like it wants to but doesnt, like you can hear the motor but it is locked up, here is a way to fix it.look at seat and see if it looks sort of cocked and you may have to straighten the seat by keeping rod in one side or other and spinning it until seat is straight. there are 2 flexy cables that run side to side and cause the seat to move. they usually have a black plastic coating on them.remove them both. with both off hit switch and see if you hear the motors.If so you should lubricate tracks with silicone spray or spray grease.put cables back into holes and it should work.the cable may give you a lil trouble coming out but just pull back and forth they wont break
under the seat is a thin wire that goes from one side to the other it has most likely broke you need to find the secondary lock it was connected to and release it to move the seat but you must also release the main lock so i suggest replacing the wire . THIS IS FOR MANUEL SEATS
now as for power seats you will have to locate the power lead wire and make sure it is not broke if so you can replace the connecter with an aftermarket one and it may work again
the first thing to do is remove the plastic skirt around rhe seat,to do this remove the seat movement knobs by prying them off with screwdriver,gental steady pressure works,then remove the screw in the rear( back seat compartment),three screws at seat switches and the side skirt will pull out (four tabs are connected to the mating plastic pieces,pull outtoward you). two screws hold the front skirt on these are tough to get to they are at an angle. with this skirt removed you can get to the motor,
three screws remove the the motor (Isuggest unplugging motor,small connector) on each end of shaft are retaining bushings rotate them toward the back and they will disengage,you can now pick up the motor and the the shafts will come out with it.these shafts disengage from the motor and should be kept seperate (greasey)
I used a R2 square drive bit (the driver used to install deck screws) to find which screwdrive is jammed, I adjusted the other one to its front stop with square driver bit the worked the jammed one back and forth mostly toward the rear and it worked free.
I adjusted this one to the front stop and reassembled the motor,shaft(make shure to snap retaining bushing in place)reconnect motor connector,all plastic skirts AND NEVER ALLOW THE SEAT TO TRAVEL TO ITS FRONT STOP AGAIN. (4HRS)
Beemer seats are just like all the others. You CAN fix your own seats it's just a matter of how much knowledge you have about working on things. You can get replacement parts at junk yards and on-line, even a complete seat in most cases.Do some investigation as to why the seats won't move correctly. Maybe a loose/broken wire leading to the affected/broken side that doesn't work. The motor that drives that side of the seatback might be loose or the attaching gears could be striped. Once you take one side apart, you'll see the problem.