I have a 1998 XJ8 3.2.
The lights click off and on when I am driving. No garage can reproduce the fault. Any ideas?

 

Hi Socrates welcome to the forum, for tech questions please post over in the section for your model year, you will receive more replies.

Ideas, loose wire, bad switch, take the mechanic with you and drive in the same place and manner that the problem occurs with you at the wheel.

 

Welcome Socrates,

Those are good suggestions from translator, must be a worrying problem at night.

 

Hey there n welcome aboard

Glad you decided to join one of the friendliest and fastest growing Jag forums around.

The mods have already welcomed you, nice one, they don't miss many, top guys and there to help if needed!

I've manually upgraded you to full forum access so you can better enjoy the site and all its features. If ya have pics of your car post em up and share them, if ya have pics of yourself, you might wanna share them in the mug shot thread located in the off topic section.
Enjoy the forum

 

Thanks to all who have replied. I retrieved the car from the Jag dealer yesterday evening. The diagnostic tests including a road test all showed no problems!
The lights started going out again after about a mile.As I was on the M4 at the time it was very worrying. I switched off the main beams and ran on sidelights and foglamps to get home. I have no idea if the sidelights go off and on as well since the headlamp symbol on the dash is not working either!
I think Translator is right. I will try to get the mechanic to come out with me. It will have to be in the dark, otherwise its not easy to see if the lights have gone out.
Will keep you informed.

 

Welcome, I believe master relay or faulty switch might be responsible for it . Hope you get it fixed out soon

 

Thanks Cadillac,
Following translator's advice, since the Jag dealer is a 30min drive away, I took it to my local garage at dusk and got a mechanic to come out with me. The lights clicked off after about 5mins and he said it sounded like the relays, as you suggested. As a non Jag garage he could not fix it unfortunately, since it apparently needs a dealer to programme the master relay.
We seem to be getting somewhere.

 

Non Jag garage identified the problem as a ' dry solder joint on body processing module'.
He fitted an earth lead to the mounting bracket and it all works perfectly now!

 

nice one

 

Welcome Socrates to the forum. You need to keep that mechanic close by and tell him I said Kudos to him for identifying the problem. You are a lucky person.