Dim headlight
There are 3 wires coming out of the housing of the light but none seem to go to a ground. Do you know which wire it would be or is it a case of following the wires further into the engine bay.
Unfortunately I don't have a diagram for your car. You could disconnect the light, switch on the circuit and then test the wires. One of them should be a ground, then it would be a case of tracing it.
I would think the ground point would be somewhere close to the unit itself.
Attached is the only thing I could find.
I would think the ground point would be somewhere close to the unit itself.
Attached is the only thing I could find.
Last edited by jimbov8; Jul 10, 2014 at 11:30 PM.
This might not help but on later XJ6s the headlight grounds are located on the sheet metal framework alongside the radiator.
Clean every ground you can find and you'll probably get the headlight grounds even if inadvertantly. It's a good practice on general princples and often pre-emptively solves the infamous "Lucas" problems.
Repeat every ten or fifteen years
Cheers
DD
Clean every ground you can find and you'll probably get the headlight grounds even if inadvertantly. It's a good practice on general princples and often pre-emptively solves the infamous "Lucas" problems.
Repeat every ten or fifteen years

Cheers
DD
YUP!!! Ground wire!
If it is the lamp with both upper and lower beams, which it seems to be as there are three wires in the socket! One for high, one for low and one for ground. The ground is probably black! Track it down.
Yeah, early on in my Jaguar stewardship, upon finding one lamp out, I did what I've done for decades, installed a new one. Nope, not here, still dark!! Chased fuses and connectors and grounds. Eureka, in the use box!! Now, I've learned that simply rolling the fuses in the cradles restores things just fine!!!
Although, once, I did get the box out of it's mount and vigourosly cleaned it's back side with a brush and a petroleum cleaner of some type, probably brake cleaner!!
Jaguar mantra, clean tighten and lubricate.
Today mebbe, back to my brake light issue!!I've cleaned tightened, changed a bulb, unsoldered and resoldered!! Lots of my toys in action!
Carl
s
If it is the lamp with both upper and lower beams, which it seems to be as there are three wires in the socket! One for high, one for low and one for ground. The ground is probably black! Track it down.
Yeah, early on in my Jaguar stewardship, upon finding one lamp out, I did what I've done for decades, installed a new one. Nope, not here, still dark!! Chased fuses and connectors and grounds. Eureka, in the use box!! Now, I've learned that simply rolling the fuses in the cradles restores things just fine!!!
Although, once, I did get the box out of it's mount and vigourosly cleaned it's back side with a brush and a petroleum cleaner of some type, probably brake cleaner!!
Jaguar mantra, clean tighten and lubricate.
Today mebbe, back to my brake light issue!!I've cleaned tightened, changed a bulb, unsoldered and resoldered!! Lots of my toys in action!
Carl
s
Thanks for everyone's help. Dodgy earth connector at back of light. Light working perfectly now
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