My left side head lamp started flicking of and on while driving sometime time ago, it stopped suddenly but now both lamps on the left side barely glow. When I turn on the high beam both left lamps go out, I checked the relays, the fuses and the module in the trunk, they all seem to be Ok. Any ideas how to solve the problem ?

 

It might help if you state the year/model of the car you are talking about, or put it in your signature or fill in a garage entry

 

It sounds like a bad ground.

 

I forgot to mention that the car is a 1999 XJR

 

I just bought a '02 XJR myself, and the front headlight already went out on me. Trying to figure out what the problem is....Help please!

 

A bad ground or dirty contacts at the socket for femtech; maybe bad relay for both. Probably a bad bulb for JH 21 in the light that has gone out. The problem with the lights remaining on is likely a broken wire in the multi-switch.

 

I tapped ground from the chassis to the headlamp ground wire, problem solved ! Thanks to JH for the hint.