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Edpike



Member Since: 04 Jul 2020
Location: NI
Posts: 21

United Kingdom 2007 Defender 110 Puma 2.4 CSW Tonga Green
Heated Seats not Working - Any Ideas

Hi All,

I have a 2007 110 CSW XS that I bought a few months back. I am working through a number of issues with it, but I am a little stumped by the heated seats. In sum they do not work.

The switches both light up to say that the seats are on, but there is no heat coming through on either the seat or the back. This applies for both seats.

I have swapped the seat bases around, but this made no difference.

I have been advised to refurb the seats with new heating elements, but I don't think this is the issue. Fuses are OK and the wiring behind the dash is all OK too.

Any ideas as car electrics are not my strong point.

Thanks - Ed.

Post #874889 28th Dec 2020 8:37am
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Greyman110



Member Since: 29 Sep 2017
Location: London
Posts: 214

United Kingdom 

Electrics aren’t my strong point either but maybe you could unplug the base and test the current with a multimeter on the car side to see if it’s being delivered. That way you know what way (car side or base side) you should start to investigate.

Before I had my defender I had zero tools and had never done work on a car before. Now I have all the tools and bits so that I can fix most things myself Laughing

Post #874891 28th Dec 2020 8:56am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4050

test for voltage with a multimeter at seat plug to start with

Post #874896 28th Dec 2020 10:05am
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AMBxx



Member Since: 24 Jul 2016
Location: York
Posts: 708

United Kingdom 2015 Defender 110 Puma 2.2 XS CSW Orkney Grey

I doubt it's the element. Normally just the drivers side that breaks due to movement when you change gear. Be a bit of a coincidence for them both to be faulty.

Were these factory fit? Not sure if available in 2007. Multimeter as other have said, then check the relay.

Post #874925 28th Dec 2020 2:59pm
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bobcat



Member Since: 10 Feb 2012
Location: United Kingdom
Posts: 11

United Kingdom 

Could still be both elements failed. It's not uncommon for seat bases to be swapped when the drivers side gets a bit tired. All the puma heated seat failures I've had have been caused by the wire breakage where the element connects in the base and in each case I've been able to solder it up. Usually fairly simple to see and do once you get the seat base apart and peel away the sticky stuff where the wires join. If the base fails the back does too.

Post #874932 28th Dec 2020 4:07pm
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Edpike



Member Since: 04 Jul 2020
Location: NI
Posts: 21

United Kingdom 2007 Defender 110 Puma 2.4 CSW Tonga Green

Sorry, should had said they are factory fit heated seats. I will try the multmeter and check for resistance. Is the full seat on the same circuit?

Post #874935 28th Dec 2020 4:52pm
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Badger110



Member Since: 06 Feb 2018
Location: South hams
Posts: 849

United Kingdom 2011 Defender 110 Puma 2.4 USW Buckingham Blue

Filament in the seat being broken is my guess with the vehicle at the age it’s at.

Only takes a coffee spill to soak through and rust the wire and it’ll break.

Check your voltage first, go from there Thumbs Up

Post #874936 28th Dec 2020 5:05pm
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Racedriver



Member Since: 24 Jan 2019
Location: Buckinghamshire
Posts: 47

United Kingdom 2009 Defender 110 Puma 2.4 SW Epsom Green

I have just repaired my XS heated seats. There is a plastic zip lock that splits the outer upper and lower seat covers. There are 2 wires going onto the heat pad for the backrest part. The yellow wire goes onto a strange small round part and from there onto the heat pad. This yellow wire from the loom had broken off at the joining point to the strange round thing. A very fiddley soldering job but re attached and all good to go.

Post #878008 12th Jan 2021 4:44pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 4286

2006 Defender 110 Td5 USW Zermatt Silver

Mine did the same. The small round thing is the heat sensor, so if it gets to hot it stops the power/heating. It also stops the seat from working just after you have soldered the wire to it, making you think you haven’t solved the issue.

Can’t think how I know that. Whistle Whistle Whistle Whistle Whistle

Post #878032 12th Jan 2021 5:45pm
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Edpike



Member Since: 04 Jul 2020
Location: NI
Posts: 21

United Kingdom 2007 Defender 110 Puma 2.4 CSW Tonga Green

Cheers for this - I will check over the weekend.

Post #878169 13th Jan 2021 10:42am
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Racedriver



Member Since: 24 Jan 2019
Location: Buckinghamshire
Posts: 47

United Kingdom 2009 Defender 110 Puma 2.4 SW Epsom Green

Update - Mine now work!!!!!!!!

Post #878418 14th Jan 2021 11:39am
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Ashbyandy



Member Since: 17 Dec 2015
Location: Leicestershire
Posts: 91

England 2015 Defender 110 Puma 2.2 Adventure Phoenix Orange

Have just done a heated seat repair this morning on a sales defender at the local indi. Same yellow wire broken off on the button thermostat. So thanks for the advise. All working fine now, and off to the new owner tomorrow. Total time 1hr.

Ashbyandy. 👍😀

Post #878422 14th Jan 2021 11:49am
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Edpike



Member Since: 04 Jul 2020
Location: NI
Posts: 21

United Kingdom 2007 Defender 110 Puma 2.4 CSW Tonga Green

Great news and I will have a look at the weekend.

Post #878428 14th Jan 2021 12:04pm
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Edpike



Member Since: 04 Jul 2020
Location: NI
Posts: 21

United Kingdom 2007 Defender 110 Puma 2.4 CSW Tonga Green

Just completed the drivers seat and I am glad to say that this was the issue and a relatively easy fix - assuming you have 4 hands to solder the wire back to the thermostat! (My wife was dragged into it). I have taken some pics and will post them on a separate post entitled Defender Heated Seat Fix. Once again, thanks for this, just the passenger seat to do...

Post #878848 16th Jan 2021 3:12pm
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