Electrical drivers seat issues

Padfoot · 2nd June 2018, 17:05

Hi,
Currently owning a mark 1 MG ZT, The car used to have alcantara seats in, but we managed to find some leather ones that were in good condition, we've fit them in with very little problems, The heated option works fine, and the seat will move forwards and backwards, but the back rest of, the seat cannot be electrically or manually adjusted.
at first we thought it was the motor, but after swapping the drivers seat out for another in my S/O car, it still didn't work, was just wondering if anyone else had come across this problem before?

Thanks in advance

TomRS · 4th June 2018, 16:15

Anyone got any help on this one? we are a bit stuck.

Basically motor and wiring on the seat are fine on both seats.. can plug into donor car and they move perfectly.
Soon as i stick it into this MK1 the forward and back work fine, but the back rest will not move at all when the electical switch is operated.

Even using the memory function the backrest stays in the same position.

Could this be a fuse or does the option need enabling in T4? its a factory high spec loom so the seats where plug and play.

Devilish · 5th June 2018, 08:42

So let me get this right, your alacantra and the leather both work in the donor car, your alacantra works in your car and the donor car, but when the leather seat is put in your car, the backrest does not work.

On the alacantra and leather seats, does the height and tilt functions work in your car and the donor car.

Nothing to do with fuse or T4, because everything is. controlled by the on board seat ecu, and no such thing as enabling backrest operation. It would be like the T4 turning lazy locking on/off if there was a lazy locking on/off switch on the console panel

Ii both seats are memory, you could try swapping the ecu's, makes no sense, but neither does your problem, so try it.

TomRS · 5th June 2018, 10:54

Quote:

Originally Posted by Devilish

So let me get this right, your alacantra and the leather both work in the donor car, your alacantra works in your car and the donor car, but when the leather seat is put in your car, the backrest does not work.

On the alacantra and leather seats, does the height and tilt functions work in your car and the donor car.

Nothing to do with fuse or T4, because everything is. controlled by the on board seat ecu, and no such thing as enabling backrest operation. It would be like the T4 turning lazy locking on/off if there was a lazy locking on/off switch on the console panel

Ii both seats are memory, you could try swapping the ecu's, makes no sense, but neither does your problem, so try it.

Hey thanks for the reply.

The orginal seats were non electric non memory, but the plugs where all in place on the seat loom (on the car) for a memory seat.

So we bought some leather seats and fitted them however the backrest wouldnt adjust electrically.
I assumed it was just a bad seat and then upon taking the fully working seat out of my own ZT-T to try it it has the exact same problem.
All the seat works but the backrest wont operate it does it on both seats so its something to do with the car loom.
Passanger seat works a charm as does the heated seat elements on both seats the memory function also works and chimes but it WILL NOT allow the backrest to move... its as though the motor is dead the switch just does nothing, but soon as i move it into another car both seats work perfectly fine...

Its really confusing the hell outta me! :|

Jim Jamieson · 5th June 2018, 11:06

I think your problem is caused with the difference in the memory loom against non memory.

I recently converted my passengers seat ( non memory) for height adjustment using parts from a drivers seat.
Obviously the switch, although does the correct functions it was upside down.

I purchased an 8 way left hand switch (non returnable) but found it was for a memory seat.
I tested all the switch connections against my drivers seat switch and all but one wire was correct.
Thus the switch does not work so I think this may also be your problem.
Try checking all wire positions between both a memory loom and non memory loom to see if there’s any differences.
Hope this helps.

2nd June 2018, 17:05	#1
Padfoot Newbie MG ZT Join Date: Feb 2018 Location: Barrow Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts	Electrical drivers seat issues Hi, Currently owning a mark 1 MG ZT, The car used to have alcantara seats in, but we managed to find some leather ones that were in good condition, we've fit them in with very little problems, The heated option works fine, and the seat will move forwards and backwards, but the back rest of, the seat cannot be electrically or manually adjusted. at first we thought it was the motor, but after swapping the drivers seat out for another in my S/O car, it still didn't work, was just wondering if anyone else had come across this problem before? Thanks in advance

4th June 2018, 16:15	#2
TomRS Posted a thing or two Mk1 ZT 190 - Mk2 ZS 180 - Mercedes E63 AMG S - Ford Ranger Hawk Join Date: Mar 2016 Location: Middlesbrough Posts: 1,456 Thanks: 123 Thanked 409 Times in 281 Posts	Anyone got any help on this one? we are a bit stuck. Basically motor and wiring on the seat are fine on both seats.. can plug into donor car and they move perfectly. Soon as i stick it into this MK1 the forward and back work fine, but the back rest will not move at all when the electical switch is operated. Even using the memory function the backrest stays in the same position. Could this be a fuse or does the option need enabling in T4? its a factory high spec loom so the seats where plug and play. __________________ http://i66.tinypic.com/5cd6xj.jpg Last edited by TomRS; 4th June 2018 at 16:18..

5th June 2018, 08:42	#3
Devilish Been round the block 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,126 Thanks: 3 Thanked 189 Times in 121 Posts	So let me get this right, your alacantra and the leather both work in the donor car, your alacantra works in your car and the donor car, but when the leather seat is put in your car, the backrest does not work. On the alacantra and leather seats, does the height and tilt functions work in your car and the donor car. Nothing to do with fuse or T4, because everything is. controlled by the on board seat ecu, and no such thing as enabling backrest operation. It would be like the T4 turning lazy locking on/off if there was a lazy locking on/off switch on the console panel Ii both seats are memory, you could try swapping the ecu's, makes no sense, but neither does your problem, so try it. __________________ If at first you don't succeed, hide the evidence Last edited by Devilish; 5th June 2018 at 08:53..

5th June 2018, 11:06	#5
Jim Jamieson This is my second home Rover less ! Join Date: Jun 2011 Location: Tarbolton Posts: 3,442 Thanks: 393 Thanked 888 Times in 542 Posts	I think your problem is caused with the difference in the memory loom against non memory. I recently converted my passengers seat ( non memory) for height adjustment using parts from a drivers seat. Obviously the switch, although does the correct functions it was upside down. I purchased an 8 way left hand switch (non returnable) but found it was for a memory seat. I tested all the switch connections against my drivers seat switch and all but one wire was correct. Thus the switch does not work so I think this may also be your problem. Try checking all wire positions between both a memory loom and non memory loom to see if there’s any differences. Hope this helps.