Hello ,
I have a 1998 xj8 I can't diagnose. Tailights and license light just stopped lighting. Fuses all good, did a hard reset (actually, I had the battery off for days). Cleaned battery cables, replaced ground cable, connectors on lamps aren't melted ('m used to finding that).
Is there a module or relay somewhere that controls these?
Thank you

 

I should add that my front parking lights all work and front side markers. The rear side markers do NOT work in addition to all the other lights not working

 

im assuming you checked that the bulbs aren't blown? My sidemarkers were all blown - all four when i bought the car. The tag lights aren't on a relay so either they are blown or something else is shorted. You may check the wiring that runs along the right trunk hinge as I've read in here that a wire can be broken. Your tail lights are on a relay but most likely you have a failed SLCM like I did. I had to bypass it for brake lights and for the tail lights until I can get a new module.

 

See the TECH TIP from June 2003

bob gauff

 

thank you motorcarman I will check it out