Having problems with my left taillight and right front fender lights and seeing if there is a fuse problem or any info to help me tackle this job.

 

"Problems" meaning they don't work? Or are the fuses blowing? Or....?

Assuming the lights in question simply don't work and the bulbs are known good......

These problems are almost always caused by bad grounds, dirty/corroded connectors, dirty/corroded bulb sockets. The grounds for the marker lights on the fenders are especially vulnerable to the elements.

Here's some reading:

Parking/Marker Lamp Circuit Checklist

Post back for more details if needed

Cheers
DD

 

Thank you, I put new bulbs in thinking that would solve the issue and it didn’t. I will go through the check list that you have listed. Thanks for all your help!

 

In the quick links there are links to all the service manual chapters. Included is a section on Electrical that contains wiring diagrams. It is this one:
Wiring Diagrams S57 Ser111 XJ6 (kindly supplied by Doug)

 

you need to disconmnect the battery, then go to the engine bay fuse box (next to the coolant tank), there are 5 fuses there, 4 for the front headlights, 1 for the auxiliary electric fan under the bumper.

once the battery is disconnected, clean the brass fuse holders of any corrosion, and close them so the fuses fit tighter.

Done.

 

^^^ This should be part of the 10-year routine service list

But, the tail lights and marker lights are on different fuses !


Cheers
DD

 

10 years? I do it every 10 days haha!

 

It was one of the 3 in-line fuses in the trunk, easy fix! Thanks for the info and support!