Electrical Question

[Karlm]

Ok, here is my problem. My left rear driving lamp/turn signal light is not working when the headlights are turned on. It stil works just fine as a turn signal, so the bulb is not bad, but it won't come on just as a marker light. Any idea what is going on here? Wiring is not exactly my forte, so I figured I would ask for help. Is there something obvious that I am missing? thanks for any help.

[Eagle]

????

They are different bulbs. The tail lights are the low-intensity filaments in the two bulbs behind the red lenses (the other filament is the brake lights). Turn signals use different bulbs in the amber portion of the housing.

[Karlm]

Right, the tail lights are OK, I am talking about the amber light. It will go on with the turn signals, but it won't go on as just a side marker light. I'm guessing it is a problem under the dash being that if it was in the wires between there and the back of the vehical, the light wouldn't go on as a turn signal.

[Eagle]

Look closely. I'm less familiar with the '97 and newer XJs, but isn't the side marker a different bulb? What's the bulb number for the turn signal bulb? If it's an 1156 (or if it has only one filament in it -- compare it to a brake light and you'll see the difference) it can't serve both functions.