Heated seats not working and some movements on electric seat

yoda960 · Dec 21st, 2012, 23:51

Hi Chaps

Bought a 940 so I could transfer the leather interior to into my 940 and was told the heated seats work, however they don't

The light lit up on the passenger side button and i'm sure I heard a relay click but I couldn't feel the heat. The drivers side button didn't light up nor heat up, but after about 2 mins the light did come up (still didn't warm up though!). Tried turning them off and on again and the light didn't come on at all for the drivers seat then.

Anyone have any thoughts? The cloth seats in my 940 both heat up very well indeed, so if parts need replacing them hopefully I can use the bits in my car currently.

Lastly, the drivers seat is electric and I have some problems with that too. The backrest doesn't move which I knew about but neither does the front of the base (up or down), the rear of the base does however go up and down and the seat does go forwards and backwards. Any idea what this could be? I can hear a relay click when I operate these two switches/functions that don't work and i'm sure I can feel something move a couple of mm or so inside the seat. Is this perhaps some cables that have been disconnected inside the seat?

Any suggestions or advice much appreciated

Once i've got these sorted i'm going to fully clean the seats and repair the scratches/damage to them with leather dye and give them a good conditioning. Will post some pics up when they are sorted

CharlesStevenson · Dec 22nd, 2012, 00:44

You're best off searching on here for old posts and following the ideas contained therein.

I've put up a couple from last year where I fixed mine and that was based upon ideas I'd obtained from here. You will find diagrams etc.

Thoughts worth noting are:

Lighting of the switches does not = the element is getting voltage
Breaks often occur where the wiring runs in the seat(s), burns will show
The thermostat in the seat base can break / go us / become detached
You can do all you need without the seats out, so if you have them out you should have no problem in fixing the heating.

Sorry, but I can't help about electric seat adjustments, you'll probably find answers here by searching, however.

940Graeme · Dec 22nd, 2012, 09:35

I understand the lack of movement in some directions is common - same prob on the passenger seat on my 960. There are lots of threads about it on here. In essence, however, the fault seems to be the potentiometer (sp?) in the motor, and the solution new motors.

Heating prob does sound like loose connections

Good luck!

barkster1971 · Dec 22nd, 2012, 12:17

If you transfer leather seats into a car with cloth ( or half cloth/leather) seats you have to remove the big green relay thats under the seats of the new leather ones. It has LEATHER written on them!
Solder the two black wires together and the heated seats should work again

CharlesStevenson · Dec 22nd, 2012, 20:53

good point - there's been some notes about the different relay for leather, my seats were cloth so forgot that one.

yoda960 · Jan 19th, 2013, 20:48

Is it the two black wires that come out of the sheath circled in green that I need to cut and solder together? Or is one of them spliced into another, i'm a bit confused!

barkster1971 · Jan 19th, 2013, 22:47

Trying to remeber now! When you look at the wires iirc the black one goes in and then goes out again of the green relay.It's those two ( same colour) that you cut and solder together. It sort of appears that you've bypassed the relay. The relay you can completely remove. The switch light needs to come on too as it's part of the circuit.
Let me know how you get on!

yoda960 · Jan 19th, 2013, 23:29

There is only one black going into the relay, it doesn't come back out (the connector to the relay has 3 wires to it - a red, black and white/black striped wire). So i'm confused about what to do with it... In the pic the relay is disconnected

yoda960 · Jan 21st, 2013, 19:22

It appears that my half leather seats currently in the car also have a green 'leather' relay fitted so I might use those on the new seats as I couldn't get the new seats working when they were fitted to the donor car..I just hope there isn't a break somewhere in the wires on the seat pad!

barkster1971 · Jan 21st, 2013, 20:26

I'll have a butchers when I deliver the wheels. The bottom swab is easy to remove and it's usually those that get broken. If you swap the bottom swab the back heated bit normally comesback to life as they're connected in series.

Dec 21st, 2012, 23:51	#1
yoda960 Volvo 960 Last Online: Today 17:47 Join Date: Mar 2008 Location: Planet Earth	Heated seats not working and some movements on electric seat Hi Chaps Bought a 940 so I could transfer the leather interior to into my 940 and was told the heated seats work, however they don't The light lit up on the passenger side button and i'm sure I heard a relay click but I couldn't feel the heat. The drivers side button didn't light up nor heat up, but after about 2 mins the light did come up (still didn't warm up though!). Tried turning them off and on again and the light didn't come on at all for the drivers seat then. Anyone have any thoughts? The cloth seats in my 940 both heat up very well indeed, so if parts need replacing them hopefully I can use the bits in my car currently. Lastly, the drivers seat is electric and I have some problems with that too. The backrest doesn't move which I knew about but neither does the front of the base (up or down), the rear of the base does however go up and down and the seat does go forwards and backwards. Any idea what this could be? I can hear a relay click when I operate these two switches/functions that don't work and i'm sure I can feel something move a couple of mm or so inside the seat. Is this perhaps some cables that have been disconnected inside the seat? Any suggestions or advice much appreciated Once i've got these sorted i'm going to fully clean the seats and repair the scratches/damage to them with leather dye and give them a good conditioning. Will post some pics up when they are sorted

Dec 22nd, 2012, 00:44	#2
CharlesStevenson Premier Member Last Online: Mar 24th, 2024 17:33 Join Date: Nov 2000 Location: Nottingham	You're best off searching on here for old posts and following the ideas contained therein. I've put up a couple from last year where I fixed mine and that was based upon ideas I'd obtained from here. You will find diagrams etc. Thoughts worth noting are: Lighting of the switches does not = the element is getting voltage Breaks often occur where the wiring runs in the seat(s), burns will show The thermostat in the seat base can break / go us / become detached You can do all you need without the seats out, so if you have them out you should have no problem in fixing the heating. Sorry, but I can't help about electric seat adjustments, you'll probably find answers here by searching, however. __________________ Now: 04 reg V70 2.4 SE 2.4 auto 177k Then: Volvo, Saab, BMW, MB, Ford, Vx, Opel, Fiat, Rover, Porsche, Alfa, Austin, Renault, etc

Dec 22nd, 2012, 09:35	#3
940Graeme Premier Member Last Online: Feb 22nd, 2024 10:32 Join Date: Jan 2010 Location: Silloth near Carlisle, Cumbria	I understand the lack of movement in some directions is common - same prob on the passenger seat on my 960. There are lots of threads about it on here. In essence, however, the fault seems to be the potentiometer (sp?) in the motor, and the solution new motors. Heating prob does sound like loose connections Good luck! __________________ Graeme 2007 XC90 SE 1998 940 Celebration

Dec 22nd, 2012, 12:17	#4
barkster1971 VOC Member Last Online: Yesterday 16:56 Join Date: Jun 2009 Location: Swineshead/Salford	Touching cloth If you transfer leather seats into a car with cloth ( or half cloth/leather) seats you have to remove the big green relay thats under the seats of the new leather ones. It has LEATHER written on them! Solder the two black wires together and the heated seats should work again __________________ new engine! new car!

Dec 22nd, 2012, 20:53	#5
CharlesStevenson Premier Member Last Online: Mar 24th, 2024 17:33 Join Date: Nov 2000 Location: Nottingham	good point - there's been some notes about the different relay for leather, my seats were cloth so forgot that one. __________________ Now: 04 reg V70 2.4 SE 2.4 auto 177k Then: Volvo, Saab, BMW, MB, Ford, Vx, Opel, Fiat, Rover, Porsche, Alfa, Austin, Renault, etc

Jan 19th, 2013, 22:47	#7
barkster1971 VOC Member Last Online: Yesterday 16:56 Join Date: Jun 2009 Location: Swineshead/Salford	memory Trying to remeber now! When you look at the wires iirc the black one goes in and then goes out again of the green relay.It's those two ( same colour) that you cut and solder together. It sort of appears that you've bypassed the relay. The relay you can completely remove. The switch light needs to come on too as it's part of the circuit. Let me know how you get on! __________________ new engine! new car!

Jan 19th, 2013, 23:29	#8
yoda960 Volvo 960 Last Online: Today 17:47 Join Date: Mar 2008 Location: Planet Earth	There is only one black going into the relay, it doesn't come back out (the connector to the relay has 3 wires to it - a red, black and white/black striped wire). So i'm confused about what to do with it... In the pic the relay is disconnected

Jan 21st, 2013, 19:22	#9
yoda960 Volvo 960 Last Online: Today 17:47 Join Date: Mar 2008 Location: Planet Earth	It appears that my half leather seats currently in the car also have a green 'leather' relay fitted so I might use those on the new seats as I couldn't get the new seats working when they were fitted to the donor car..I just hope there isn't a break somewhere in the wires on the seat pad!

Jan 21st, 2013, 20:26	#10
barkster1971 VOC Member Last Online: Yesterday 16:56 Join Date: Jun 2009 Location: Swineshead/Salford	Seats I'll have a butchers when I deliver the wheels. The bottom swab is easy to remove and it's usually those that get broken. If you swap the bottom swab the back heated bit normally comesback to life as they're connected in series. __________________ new engine! new car!

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