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jrule



Member Since: 10 Aug 2015
Location: Hertfordshire
Posts: 302
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
TD5 air conditioning wiring
Hi

I am currently retrofitting air conditioning to my MY2000 defender. I have fitted the dash unit and my car has the correct brown 9way multiplug to the fuse box. I am however a bit lost as to how to wire up the condenser fan and the compressor. They each have two way multiplugs which I need to wire in.

Has anyone have experience of the wiring to these units and how I can complete the install. Many thanks in advance I can't seem to reconcile the Land Rover wiring diagram.
Post #589192 1st Jan 2017 2:35pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
pic missing PC problems Rolling Eyes windows 10 Banging Head

Last edited by dorsetsmith on 25th Jun 2019 8:45am. Edited 3 times in total
Post #589196 1st Jan 2017 2:57pm
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jrule



Member Since: 10 Aug 2015
Location: Hertfordshire
Posts: 302
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
Many thanks that's very good of you. Looking at the diagram it appears I need to wire back to relay R181 and R117. Do you have access to any diagrams that show where these are located if not it seems I will need to make up a loom ?
Post #589208 1st Jan 2017 3:37pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
two relay are located in drive seat box
Post #589212 1st Jan 2017 3:46pm
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jrule



Member Since: 10 Aug 2015
Location: Hertfordshire
Posts: 302
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
Ah excellent I shall have a good look
Post #589213 1st Jan 2017 3:51pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
https://1drv.ms/i/s!AtZSoWFHDgnGhR4qVgu8b6oQxRlV
Post #589214 1st Jan 2017 3:57pm
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Catalou66



Member Since: 24 Jun 2019
Location: Paris
Posts: 2
France 
Hi,
(Sorry for my English because I’m french)
I want also to install an Airco coming from a Defender TD5 99 to my Defender TD5 06 but it looks like the pics you posted has disappeared. May you post them again? I really would appreciate it.

Thanks a lot in advance!
Post #778867 24th Jun 2019 9:50pm
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Steve_overland



Member Since: 14 Oct 2018
Location: Gaydon
Posts: 290
United Kingdom 1997 Defender 110 300 Tdi HT Chawton White
I can’t see them either... will the diagrams work for 300tdi.. cheers @steve_overland on Insta.
110 expedition vehicle with pop roof
Post #778869 24th Jun 2019 9:56pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
link to TDI 300 wiring AC too

https://1drv.ms/b/s!AtZSoWFHDgnGjD447hxdHo-gv_oL

Last edited by dorsetsmith on 25th Jun 2019 6:53am. Edited 1 time in total
Post #778886 25th Jun 2019 6:22am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554
Catalou66 wrote:
Hi,
(Sorry for my English because I’m french)
I want also to install an Airco coming from a Defender TD5 99 to my Defender TD5 06 but it looks like the pics you posted has disappeared. May you post them again? I really would appreciate it.

Thanks a lot in advance!


Ac fuse are different places between TD5 99 and TD5 06 main loom as the centre fuse box changed post 02 face lift

will re post then

Last edited by dorsetsmith on 25th Jun 2019 7:22am. Edited 1 time in total
Post #778889 25th Jun 2019 6:29am
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dorsetsmith



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

Click image to enlarge


Click image to enlarge

MY 1999 to 2000

Last edited by dorsetsmith on 25th Jun 2019 8:43am. Edited 1 time in total
Post #778896 25th Jun 2019 6:55am
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6642
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
Td5 and 300 Tdi in here (2002MY):

https://www.defender2.net/gallery/albums/u...IONING.pdf  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #778905 25th Jun 2019 8:04am
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Catalou66



Member Since: 24 Jun 2019
Location: Paris
Posts: 2
France 
Thanx a lot!
Post #778958 25th Jun 2019 3:08pm
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MYSTERY



Member Since: 14 Jun 2019
Location: Torquay
Posts: 10
United Kingdom 
ONE SHEET

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Post #783691 28th Jul 2019 8:44pm
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achuakh



Member Since: 12 Apr 2012
Location: Singapore
Posts: 161
Singapore 2002 Defender 90 Td5 SW Oslo Blue
technically, you don't need to get the AC unit to talk to the ECU.

Pro:
When it's wired to the ECU, the ECU can control when to "request AC clutch" and when to "request AC fan".
When the driver turns on the AC, he "request AC" to the ecu via the 12v AC request at high.

The ECU then checks the operating conditions like engine temperature and engine rpm. If the temperature is ok and the engine is not labouring, the ecu will then "request AC clutch" and then "request AC fan". If the engine temperature is high, the ECU can also use the "request AC fan" to aid cooling If the engine rpm is high, then it will not immediately "request AC clutch"

When "AC clutch request" is made, depending on the RPM, there's a table in the ECU map to inject more fuel and it tapers down around 4000rpm.

Con:
Let's not complicate the install as you will need to mess around with the ECU pins and such to get those to close the correct relay.

If using a manual AC unit, when the AC clutch and fan are on, the ECU will already know how to compensate for the drop in RPM when idling so there's no adjustment to do.

Having a separate AC system from the ECU is easier to isolate if something goes wrong. The defender has migrated, leaving the owner behind.
Post #783781 29th Jul 2019 12:27pm
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