What can I check?
If I disconnect temp connector will that force fans on?

 

Do these charts help ?

turning on the a/c should turn them on.


Z

 

I will need to recharge the AC then.

 

No. You can jump at the temp sensor plug with resistor shown which will turn them on. A/C being on is a hassle and not definitive because of pressure switch involvement,

 

if i read that correctly 100 ohm 5% 1 watt resistor ?

what is range of resistance that willwork

 

Sorry but that's a question l can't answer. Just know it will mimic fan on signal. Unplug at temp sensor insert resistor into plug, ignition on, fan runs, if not something is wrong.

 

I have my fans running at half speed all the time ..you just earth one wire . Works as normal running a little after the engine is shut off and aircon/high speed as normal ..engine at 88C ( 190F ) just rising slighty if you put your pedal to the metal . Measured on scangauge.
If you do a search I wrote it up ..will try to find it for you.
You are in luck.
Running temperature / Thermostat / Fans - Jaguar Forums - Jaguar Enthusiasts Forum
Now been in use for many miles and no problem.

 

I recharged ac and everything is okay.