Electric seat wiring problem

Devilish · 21st February 2010, 16:37

The pic below is from the drivers electric seat I bought, the motors and heating elements worked when it was removed from the car.

I have identified the 4 wires going from the motors and heating elements to the plug socket as in the pic below. I have wired them up and have put a multimeter across the 4 socket cavities and they read as identified.

1/ Orange/Green = motors ignition +
2/ Black = motors -
3/ Orange/White = seat elements ignition +
4 Yellow seat elements - from the switch

I have wired them up, but none of the motors are working in either seat.
How can none of the motors work in either seat, have I missed something.

Larger pic of under seat

Greeners · 21st February 2010, 16:49

Orange / White Pin 2 Heated Seat ignition switched feed
Yellow Pin 1 Heated Seat switch

Brown/Pink Pin 5 Fuse 3 (5 Amp)
Orange/ Green Pin 8 Fuse 19 (30 Amp)
Orange / Yellow Pin 4 Fuse 21 (30 Amp)
Black Pin 3 Ground
Black / Slate Pin 7 Ground

I think that's all

Devilish · 22nd February 2010, 05:22

Dave.

I have re checked the wiring, I have gone by actual pin nubers as you stated, that also correspond with the wiring diagram. Yet the motors in both seats do not work.

What does the yellow relay type unit is do, is it anything to do with reversing the polarity for the motors.

If the loom was chopped though by a numpty with the battery connected could it have done anything to this yellow relay. All the lad at the yard said was "I remember having to fit a battery to move the seats back & forth to get the bolts out".

Am going to hack into the wiring loom and connect the motors direct

Also, what is the thin cable for that is attached to the rear of the seat sub frame.

I took the supply from the fusebox, and jumped from pass seat to drivers seat.

SD1too · 22nd February 2010, 08:09

Stephen,

I don't know the history to this. Are you trying to fit electric seats to a car which originally had manual seats? If so, have you bought memory or non-memory seats? I can have a look at the circuit diagram once I know.

Simon.

Departed · 22nd February 2010, 12:44

Hi, with those relays, you have an early seat. They (or at least passenger) only operate with ignition on. I think if the driver is memory, it will operate ignition on, or if the door is open (signal from kbus).

The heated seat supply wire is also used to switch the relay on to make the motors work. So you need ign on this before they work.

The heated seat is actually switched to ground via the yellow, not supplied on this wire.

So you need power on both orange wires, but not permanently as you will get a flat battery from the relay current drain.

grossebaby · 22nd February 2010, 14:49

All this makes me wonder, do you think my electric memory seats are heated and I just need to get the switches fitted in the dash? They were not original to my car but I did wonder if all elec mem seats ahould be heated?

Devilish · 22nd February 2010, 20:38

Quote:

Originally Posted by grossebaby

All this makes me wonder, do you think my electric memory seats are heated and I just need to get the switches fitted in the dash? They were not original to my car but I did wonder if all elec mem seats ahould be heated?

There seems to be no hard and fast rule, it is down to optional extras. If there is no heated seat switches, then I doubt very much if there will be any wiring to the seat plug. Below is a section from the above seat pic, on it I have labeled the heated seat elements wiring, if your seat has these wires, your seats have heater elements, and you just need to wire them up. if not bad luck.

Devilish · 22nd February 2010, 20:40

Quote:

Originally Posted by SD1too

Stephen,

I don't know the history to this. Are you trying to fit electric seats to a car which originally had manual seats? If so, have you bought memory or non-memory seats? I can have a look at the circuit diagram once I know.

Simon.

Many thanks Simon, I have the wiring diagram, and I wired them correctly, that was the problem

Devilish · 22nd February 2010, 21:02

All working perfectly, I did not connect the heated switch + at the box because i had no switch plugs yet, as lowedb pointed out the supply to ther motors and the elements need to be live to run the relay.

huge thanks to Greeners & lowedb for the help. Oh and trebor for the diagram and the weak coffee with not enough sugar

trebor · 22nd February 2010, 21:51

Quote:

Originally Posted by Devilish

All working perfectly, I did not connect the heated switch + at the box because i had no switch plugs yet, as lowedb pointed out the supply to ther motors and the elements need to be live to run the relay.

huge thanks to Greeners & lowedb for the help. Oh and trebor for the diagram and the weak coffee with not enough sugar

well thats some gratitude i suppose, at least you liked the diagram !

21st February 2010, 16:37	#1
Devilish Been round the block 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,125 Thanks: 3 Thanked 189 Times in 121 Posts	Electric seat wiring problem The pic below is from the drivers electric seat I bought, the motors and heating elements worked when it was removed from the car. I have identified the 4 wires going from the motors and heating elements to the plug socket as in the pic below. I have wired them up and have put a multimeter across the 4 socket cavities and they read as identified. 1/ Orange/Green = motors ignition + 2/ Black = motors - 3/ Orange/White = seat elements ignition + 4 Yellow seat elements - from the switch I have wired them up, but none of the motors are working in either seat. How can none of the motors work in either seat, have I missed something. Larger pic of under seat __________________ If at first you don't succeed, hide the evidence

21st February 2010, 16:49	#2
Greeners Moderator MG-ZTT Join Date: Mar 2007 Location: Ware, Herts Posts: 19,798 Thanks: 161 Thanked 1,249 Times in 1,036 Posts	Orange / White Pin 2 Heated Seat ignition switched feed Yellow Pin 1 Heated Seat switch Brown/Pink Pin 5 Fuse 3 (5 Amp) Orange/ Green Pin 8 Fuse 19 (30 Amp) Orange / Yellow Pin 4 Fuse 21 (30 Amp) Black Pin 3 Ground Black / Slate Pin 7 Ground I think that's all __________________ *David* Impecunity is the mother of ingenuity Useful how to's for common problems Car Of The Month Jan 2014 [SatNav Power Down] [Coolant Level] [SatNav Repair] [Diesel Non Starting] [Paint Codes] [Rear Light Seals] [Reversing Light Switch] [Bleeding Brakes][Sunroof Drain] [Early ZT's][Instrument Pack Diagnostics][ATC Diagnostics]

22nd February 2010, 05:22	#3
Devilish Been round the block 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,125 Thanks: 3 Thanked 189 Times in 121 Posts	Dave. I have re checked the wiring, I have gone by actual pin nubers as you stated, that also correspond with the wiring diagram. Yet the motors in both seats do not work. What does the yellow relay type unit is do, is it anything to do with reversing the polarity for the motors. If the loom was chopped though by a numpty with the battery connected could it have done anything to this yellow relay. All the lad at the yard said was "I remember having to fit a battery to move the seats back & forth to get the bolts out". Am going to hack into the wiring loom and connect the motors direct Also, what is the thin cable for that is attached to the rear of the seat sub frame. I took the supply from the fusebox, and jumped from pass seat to drivers seat. __________________ If at first you don't succeed, hide the evidence Last edited by Devilish; 22nd February 2010 at 06:03..

22nd February 2010, 08:09	#4
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,368 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Stephen, I don't know the history to this. Are you trying to fit electric seats to a car which originally had manual seats? If so, have you bought memory or non-memory seats? I can have a look at the circuit diagram once I know. Simon. __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

22nd February 2010, 21:02	#9
Devilish Been round the block 75 Tourer Join Date: Apr 2009 Location: Cannock Posts: 4,125 Thanks: 3 Thanked 189 Times in 121 Posts	All working perfectly, I did not connect the heated switch + at the box because i had no switch plugs yet, as lowedb pointed out the supply to ther motors and the elements need to be live to run the relay. huge thanks to Greeners & lowedb for the help. Oh and trebor for the diagram and the weak coffee with not enough sugar __________________ If at first you don't succeed, hide the evidence Last edited by Devilish; 22nd February 2010 at 21:06..

22nd February 2010, 12:44	#5
Departed Retired -- Join Date: Jan 2007 Location: -- Posts: 3,785 Thanks: 0 Thanked 4 Times in 4 Posts	Hi, with those relays, you have an early seat. They (or at least passenger) only operate with ignition on. I think if the driver is memory, it will operate ignition on, or if the door is open (signal from kbus). The heated seat supply wire is also used to switch the relay on to make the motors work. So you need ign on this before they work. The heated seat is actually switched to ground via the yellow, not supplied on this wire. So you need power on both orange wires, but not permanently as you will get a flat battery from the relay current drain.

22nd February 2010, 14:49	#6
grossebaby Gets stuck in SUBARU LEGACY DIESEL Join Date: Sep 2007 Location: Halifax Posts: 508 Thanks: 0 Thanked 0 Times in 0 Posts	All this makes me wonder, do you think my electric memory seats are heated and I just need to get the switches fitted in the dash? They were not original to my car but I did wonder if all elec mem seats ahould be heated?