Question about 2006 Jaguar XJ8
My 1998 xj8 is over heating. The fans work with the a/c on but won't come on when the temp is high. I tried to find the fan s/w but I don't see it on the engine. Is it on the radiator? I wanted to check it for power.
The early XJ8s were designed to operate as you describe, only kicking the fans in with the AC which is fine when the cars warming up (in fact it helps the car warm up faster & use less fuel), however, Jaguar realised in some climates this was causing overheating, later ones (99my on) operate constantly with the ignition on at slow speed & speed up if it detects it needs to.
This is a complex 2 relay system with alot of wiring that goes into the ECU & cant easily be retrofitted to your one.
I`d advise you to take the car to a good auto electrician & ask him to fit a manual switch on the dash with a relay to the fans so you can turn it on manually when its warmed up (if he can fit a slow speed relay with a resistor as well as a full power one, all the better, as you dont want to over cool either).
I`d also advise you to get the thermostat changed every year & the water pump to be upgraded to the current spec one, as these are both known issues that occur & also cause overheating.
Best of luck!
Posted on Dec 13, 2008
A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Dec 30, 2015 | Jaguar Cars & Trucks
Apr 19, 2013 | 2001 Jaguar XJ8
Jun 19, 2011 | 2006 Jaguar XJ8
Dec 13, 2010 | 2006 Jaguar XJ8
Jun 21, 2009 | 2001 Jaguar XJ8
Oct 28, 2008 | 2006 Jaguar XJ8
Aug 06, 2008 | 2001 Jaguar XJ8
1,063 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: