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Edpike

Member Since: 04 Jul 2020
Location: NI
Posts: 35

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.

28th Dec 2020 8:37am

Greyman110

Member Since: 29 Sep 2017
Location: London
Posts: 327

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

28th Dec 2020 8:56am

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

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

28th Dec 2020 10:05am

AMBxx

Member Since: 24 Jul 2016
Location: York
Posts: 1042

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.

28th Dec 2020 2:59pm

bobcat

Member Since: 10 Feb 2012
Location: United Kingdom
Posts: 12

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.

28th Dec 2020 4:07pm

Edpike

Member Since: 04 Jul 2020
Location: NI
Posts: 35

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?

28th Dec 2020 4:52pm

Badger110

Member Since: 06 Feb 2018
Location: South hams
Posts: 1039

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

28th Dec 2020 5:05pm

Racedriver

Member Since: 24 Jan 2019
Location: Buckinghamshire
Posts: 115

2015 Defender 110 Puma 2.2 USW Indus Silver

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.

12th Jan 2021 4:44pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 5804

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.

12th Jan 2021 5:45pm

Edpike

Member Since: 04 Jul 2020
Location: NI
Posts: 35

Cheers for this - I will check over the weekend.

13th Jan 2021 10:42am

Racedriver

Member Since: 24 Jan 2019
Location: Buckinghamshire
Posts: 115

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

14th Jan 2021 11:39am

Ashbyandy

Member Since: 17 Dec 2015
Location: Leicestershire
Posts: 224

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. 👍😀

14th Jan 2021 11:49am

Edpike

Member Since: 04 Jul 2020
Location: NI
Posts: 35

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

14th Jan 2021 12:04pm

Edpike

Member Since: 04 Jul 2020
Location: NI
Posts: 35

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...

16th Jan 2021 3:12pm

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