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Tank



Member Since: 25 Jul 2014
Location: Fife
Posts: 430
Scotland 2004 Defender 90 Td5 HT Zermatt Silver
TD5 Heater Fan
Help!

So the heater was working ok up until a few days ago, now nothing!

I have tried all the obvious stuff,

1. Checked fuse, think there is only one fuse? It's ok.
2. Checked that fan actually spins by sticking my hand into the fan from the wing! It's fine and spins freely.
3. Replaced the fan switch with a new genuine Land Rover one!
4. I get power at the fan switch, power on both green wires? Is that normal? Not sure how the switch works with a resistor?

Anyway flummoxed! The trip up to Aviemore last night was interesting in -1°!

Any help would be appreciate.

Thanks

Duncan
Post #933205 11th Dec 2021 5:37pm
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dorsetsmith



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

Click image to enlarge


heater switch first stage swathes ground with resister - stage two or flat out bypasses resister to the motor

check that you good ground the switch

black wire with black spade on the end and male spade lug on the switch lever

Last edited by dorsetsmith on 11th Dec 2021 6:53pm. Edited 3 times in total
Post #933214 11th Dec 2021 6:34pm
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htb2



Member Since: 02 Nov 2018
Location: aberdeenshire
Posts: 510
Scotland 
Looks like an earth problem from the switch.
Post #933216 11th Dec 2021 6:39pm
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Tank



Member Since: 25 Jul 2014
Location: Fife
Posts: 430
Scotland 2004 Defender 90 Td5 HT Zermatt Silver
Thank you, I'll have a look at that.

Electrics isn't my best out will see what I can do.

Cheers

Duncan
Post #933218 11th Dec 2021 6:48pm
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Tank



Member Since: 25 Jul 2014
Location: Fife
Posts: 430
Scotland 2004 Defender 90 Td5 HT Zermatt Silver
Can I ask if there is a difference between the two green wires? Do they need to go a certain way round?

Thanks

Duncan
Post #933269 12th Dec 2021 11:59am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
plug is pin 1 GS - green -slat gray

2 GY - green -yellow

3 Black

and heater slide switch is



Click image to enlarge
Post #933276 12th Dec 2021 1:08pm
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Tank



Member Since: 25 Jul 2014
Location: Fife
Posts: 430
Scotland 2004 Defender 90 Td5 HT Zermatt Silver
Thank you
Post #933290 12th Dec 2021 4:15pm
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MC84



Member Since: 23 May 2016
Location: Near Bristol
Posts: 341
United Kingdom 2001 Defender 90 Td5 HT Chawton White
Great and detailed information as always Dorsetsmith Thumbs Up Thumbs Up Mike

Hard Top 90 TD5 2001
Ford 100e 1959
www.youtube.com/mikemakesit
Post #933333 12th Dec 2021 11:35pm
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Tank



Member Since: 25 Jul 2014
Location: Fife
Posts: 430
Scotland 2004 Defender 90 Td5 HT Zermatt Silver
So Dorsetsmith, it appears I have more than just this issue now!

Driving home from a weekend in Aviemore last night and I had the heated front screen on, the lights and I was using the windscreen wipers. I noticed that if I had the front heated screen on, and the rear as well that every time I used the wipers the speedometer dropped and the needle pulsed or flicked in time with the wipers Rolling with laughter

Does this mean I have a major earth issue? How many earths does the TD5 have and where are they. I assume if one or all of them are corroded that this could cause not only the issue with the heater blower but also the other electrical gremlins I have discovered?

Cheers

Dunk
Post #933450 13th Dec 2021 5:47pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
start with your battery neg follow onto the chasse and then on to transfer box over to driver side under nether chasse to body work strap and in engine bay just behind coolant expansion tank earthing header

good place start with

earth header C0289 K109 behind centre fascia (radio )

C0550 k108 engine bay just behind coolant expansion tank earthing header on the bulkhead

have check earthing from battery . run temp wire down from the heater switch to the battery neg and see if this helps with your earthing problem

under nether driver side chasse to bulkhead strap


Last edited by dorsetsmith on 15th Dec 2021 11:32pm. Edited 1 time in total
Post #933460 13th Dec 2021 7:03pm
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Tank



Member Since: 25 Jul 2014
Location: Fife
Posts: 430
Scotland 2004 Defender 90 Td5 HT Zermatt Silver
Thank you so much, really appreciated.

I had a lot of bulkhead work done with windscreen out and other bits off, wings etc etc. Maybe the earths havent been put back correctly.

Regards

Duncan
Post #933520 14th Dec 2021 11:04am
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Tank



Member Since: 25 Jul 2014
Location: Fife
Posts: 430
Scotland 2004 Defender 90 Td5 HT Zermatt Silver
Hi Dorsetsmith

So gets even more interesting now as there is a smell of burning, so my son tells me. I can't smell it as I am getting over Covid and have no sense of taste or smell! Where is the earth strap behind the dashboard is it easy to find?

Cheers

Dunk
Post #933731 15th Dec 2021 9:02pm
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dorsetsmith



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


Under nether vehicle on driver side between chasse to bulkhead
Post #933751 15th Dec 2021 10:06pm
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Tank



Member Since: 25 Jul 2014
Location: Fife
Posts: 430
Scotland 2004 Defender 90 Td5 HT Zermatt Silver
OK

I'll get under the car at the weekend.

Could that be the issue?

Dunk
Post #933764 15th Dec 2021 10:30pm
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dorsetsmith



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

Click image to enlarge


Click image to enlarge
Post #933768 15th Dec 2021 11:31pm
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