'94 AC Install in a '95 D90 - Defender Source
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  #1  
Old April 9th, 2013, 10:17 AM
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'94 AC Install in a '95 D90

Retrofitting a '94 AC (Davia) system in to a '95 D90. I have the complete '94 harness and the '95 has the two plugs in the right footwell. Can I just retrofit the '94 harness to adapt to the '95 plugs?

I have the '95 AC wiring diagram and am looking for the '94 diagram. Anyone have it?
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  #2  
Old April 9th, 2013, 10:44 AM
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I think Jason - leastonce had a whole thread on this for his '95 just last year.

There are manuals all over the web. I use these:

http://lhsw.com/d90/

http://www.internet-tools.co.uk/land...l%20(1993).pdf
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Old April 9th, 2013, 10:51 AM
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Quote:
Originally Posted by Wolf Fabrication View Post
Retrofitting a '94 AC (Davia) system in to a '95 D90. I have the complete '94 harness and the '95 has the two plugs in the right footwell. Can I just retrofit the '94 harness to adapt to the '95 plugs?

I have the '95 AC wiring diagram and am looking for the '94 diagram. Anyone have it?
'94 is same as '93 for the AC ... i didnt have the plugs to make the change but you probably can do this by extending the 94 harness a little. The plugs run direct to the ECU and one of them tells the ECU that the AC is running to help with the idle ... I don't recall the others function.

I don's have access to my truck until Friday to look but will take a look back at my thread when Josh links to it ....
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Old April 9th, 2013, 10:57 AM
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Cool, I'll wait for Josh.
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Old April 9th, 2013, 10:58 AM
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AC24 is the connector ... the wiring is on page 46 ( ECU side ) and 47 AC side in this doc

http://www.internet-tools.co.uk/land...l%20(1993).pdf

on the 47 side you have to work out what wires on the '94 AC harness are equivalent. Given that 2 are ground and one is a signal when the AC is on ... it shouldn't be too tricky to figure out.
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Old April 9th, 2013, 11:08 AM
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Found it:

wwwdefendersource,com/forum/showthread.pho?t=44560
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Old April 9th, 2013, 11:16 AM
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Originally Posted by rijosho View Post
Classy
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Old April 9th, 2013, 12:16 PM
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i am still laughing!
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Old April 9th, 2013, 08:26 PM
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Damn it...

I am looking for a clear, concise '94 AC wiring diagram. Similar to the '95 diagram below. I am trying to mate the '94 system to the '95 footwell plugs.

Also looking to see what wires go where on the '95 switches. Anyone? Beuler?
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Old April 12th, 2013, 08:33 PM
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the two long yellow go on the big double blade connector temp switch near the thermostat.

the front fan should be a single hot wire and a ground that you attach in the proximity.

the wiring in mine was rushed and i never got round to fixing it up ... but ,,, hopefully this will help. The yellow wire is the trigger to the ECU to tell it the ac is running and only gets power when all the triany ( system pressure ) , temp switch and ac clutch are engaged.

The black went to ground ... probably should be on the ecu via one of the leads but for this purpose any ground worked.

The black and white went to black from under the dash

now caution it was dark when i took the photo and was wearing a suit so didn't get too close. If something doesn't seem right let me know and i'll try and do better pics in the morning.
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #11  
Old April 13th, 2013, 03:34 PM
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Jonathan - Does your AC back look like this?

If it does could you measure the port sizes? Thread? type ... nut sizes? anything in fact so i can get a matching sanden back?

thanks

also other useful docs for future people looking at this thread

http://p38arover.com/rover/p38a/Engi...UX_Systems.pdf

has the details of the wires to the ECU to help map out the connectors.
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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