Hello, A headlight problem: high beams work, low beams and PLs do not. A clock sping and stem was installed with no result. Pleas advise on any ideas. Thanks, Greg

 

The clock spRing is in the steering wheel. What does it have to do with lights?
The next person to comment will ask you to let us know, which model exactly you have...
What's a PL? Wild guess: Parking lights?
Did you check all the fuses?
Maybe the stalk switch (which lets you toggle between high and low beam) is faulty (but even if: Not even the wiring from the stalk switches to the relay goes thru the clock spring...) - but more likely than a faulty stalk switch is actually that the relay, which that stalk switch controls, is faulty in some way...
And there could also of course be blown light bulbs, but - granted - 4 filaments blowing all at once (if PL is Park Light) is quite unlikely.

PS: I just noticed your subject line is 2003 S-Type... - Normally you write in the subject lien the issue... - so we know the model now...

 

Welcome to the forum,

Does your car have regular headlamps or the HID version? If HID, you'll see a small (rectangular?) ballast at each headlamp assembly.

Wiring diagrams here, at the top of the page:

JagRepair.com - Jaguar Repair Information Resource

Scroll down to section 08.1 or 08.2 depending which headlights are installed. Note how the exterior lighting is a ground-switched system, unlike most vehicles. Battery power is supplied to one side of the bulb, and the control module switches the ground on or off.

Follow the circuits back to their power source, and you will see a number of fuses to be checked. If not comfortable reading wiring diagrams, let us know which headlights you have and we can list the respective fuses.

Don't laugh, but have you confirmed both headlight bulbs are good? A few years ago, a co-worker came into the office in a panic, as his car's low beams were not working. He had to drive with high beams only. He is an excellent troubleshooter but went straight to some common point taking out both low beams. He was preparing to order a new light switch when I asked if he had checked the bulbs. He poo-pooed the idea but finally relented. Turns out he had been driving with only one low beam for some time, unaware he was down to a single bulb. He never realized anything was wrong until the second bulb failed.

 

This is going to sound like a really dumb suggestion ..... but it doesn't have blown globes does it? I've found people can drive forever with a single headlight out .... and then oneday assume the headlight circuit is gone because they have no headlights (when the reality they had one headlight for a long time, now they have none). Same with the parkers, they aren't just out are they? There is no other weird lights issues to suggest earthing issues?

seeya
Shane L.