Drivers seat keeps moving backwards on its own

[Bucksspeedyboy]

I bought a 2014 Peugeot RCZ in February but for various reasons I didn’t get to drive it much until March - and then we had the lockdown.

Since then I’ve been going to the supermarket every 5 days or so and then making sure I give the car a decent blast on the way home. About 3 weeks ago as I was driving at low speed round a supermarket car park, the driver’s powered seat started moving backwards of its own accord. I then returned it to the correct position using the memory button. Since then the last few times I have been out, the seat has intermittently moved back slightly so again I have to reset it using the memory.

Then this afternoon as I was driving relatively fast along an A road, the seat kept moving backwards a little bit every few minutes, so much so that eventually I had to stop and reset the position because I couldn’t reach the pedals anymore! When I bought the car there was something in the recent service history saying driver’s seat was broken but I took this to mean that the seat motor wasn’t moving or something - but I appear to have the opposite problem. Any ideas?

[GreenV8S]

I would suspect a wiring fault in the loom to the position adjustment switch, or possibly a fault in the switch itself or something physically pressing on it and causing it to operate.

[PaulKemp]

It should have a lock of some sort or it would only be held by the motor.

[E-bmw]

They are normally just held in place by the motor gearbox.

They use a worm/worm wheel to move & the wheel cannot drive the worm so they are self-locking.

As above there is likely an intermittent switch/wiring issue.

[Penelope Stopit]

Does disconnecting the switch make any difference?

[Bucksspeedyboy]

Thanks for the replies guys. Is there some way of disconnecting the switch without major surgery? Do you have to get the base of the seat up somehow to get to bottom of switch (and disconnect it) ?

[rigga]

Wonder if the BCM (body control module) is borked, giving spurious signals to the motor?


No idea if the seat is controlled by said module, but you get the idea.

[Haltamer]

One thought that comes to mind, and may be possible depending on the design of the switch - Could you blast some contact cleaner in? May just be something causing it to short out - And worth a go as a 15 second solution

[GreenV8S]

Bucksspeedyboy said:

Thanks for the replies guys. Is there some way of disconnecting the switch without major surgery? Do you have to get the base of the seat up somehow to get to bottom of switch (and disconnect it) ?

I don't know that car, but quite often when switches are mounted to a panel they can be removed from the front, which then gives you access to the wiring connections.

[PaulKemp]

There may be a fuse in the fuse box you could pull

[PaulKemp]

There may be a fuse in the fuse box you could pull

[Order66]

PaulKemp said:

There may be a fuse in the fuse box you could pull

This. Or just have a look under the seat - there's likely a connector you can disconnect that'll take the power away from the seat (put it in the correct position first obviously!)