Meanwhile, it appears that the clutch has been modified as there is a wire soldered to the red wire on the red relay. But still no power to that wire. All fuses are intact.
There is a seperate wire green/yellow which appears to go to temperature sensor on the water manifold? Is that usually connected to the “earth” of the ac clutch so it only comes in when water temperature is up? Or to the relay?
Also the temperature sensor on/ in the radiator has been disconnected so I suppose that it was faulty too!
To get it back to original looks like a few parts will have to be replaced.
Alternatively a new wire to the red relay from a accessory somewhere, through a switch to turn both the auxiliary fan and the clutch.
Any thoughts?
Col

 

I don't understand. How was the clutch modified?

A red wire at the red relay is obviously non-original



None of the temp sensors on the water rail have anything to do with the compressor or the fan. The correct connections to the fan relay and compressor have been given to you in the postings above


Decide which way you want to go. Original or modified. Post back.

As for simply getting the compressor clutch to engage, run the green/brown wire to one terminal of the compressor clutch connector and a ground wire to the other. That should get the compressor going.

If you don't have power on the green/brown wire then you have a problem with the controls inside the cabin....or a problem with the wire itself

Cheers
DD

 

sounds like the previous owner did the auxiliary fan mod, so that the auxiliary fan runs everytime the compressor clutch kicks on. It was a popular mod in the 1980's and 1990's to control the temperature in city driving.

There should be a Diode in that wire between the compressor and the red relay.

Download the S57 Wiring Guide from my website if you want to study the wiring. Sounds like you already know how to follow wiring.

my website is: www.jagupgrades.webstarts.com

the Wiring Guide and all other documents are free.

 

Thanks Jose, great informative site.
Col

 

Now even the fans have stopped working. I have a device “climatron serial no.8811 is that a replacement for the control module? 2”” x 3/4” 8 wires plus a fused earth. If it is can
I just unplug the old one and plug it in?
There is power on fuse 6 but the switches make no different to it. The air conditioning mechanic said the clutch didn’t pull in until it was left for some time. I don’t know if it was working before as there was no gas in the original compressor and the fusible link Was open circuit.
Grasping at straws now.
Col

 

that is a replacement Amplifier, controls the temperature from cold to hot and viceversa.

the blowers are controlled by a big relay with many wires connected to it. One of those wires is at the center and it is screwed to the terminal while all the others are spade connectors.

 

One week since my mate passed while we were on a motorcycle ride so I will give the Jag and my mental health a rest for a week or so. Need to take my wife to Dr. appointment 500klms away. I’ll be back soon.
Col

 

I'm so sorry you lost your friend.
My condolences.
(';')

 

I’m back after a week of relaxation, not really, taking wife to Dr. in Sydney, did I tell you how much I hate driving in Sydney now? Anyway still have not finished with the air but with the radiator temperature switch disconnected and the two wires joined at last I could get the “red” relay to switch on. Therefore the green/white wire which was originally hooked to it should have powered the air compressor clutch.But there was still no power until I found that the diode was blocking not allowing the current flow. It must have been always like that since whomever wired the shortcut because the lugs were male and female. Reversed the diode and now the aux. fan and compressor clutch pull in.
Now I just need to put the car back together and hope it still works.
Fans appear to be to be working and air flaps are changing correctly.
Thanks to all who helped.
cheers Col.