Headlight problem
#1
Headlight problem
My 06 XK8 has developed a weird headlight problem. After I turn on the
headlights they work for about 5 minutes and then the drivers side goes out.
If I switch to the high beams the same thing happens. If I turn the lights
off then back on they will work for another 5 minutes or so.
headlights they work for about 5 minutes and then the drivers side goes out.
If I switch to the high beams the same thing happens. If I turn the lights
off then back on they will work for another 5 minutes or so.
#2
#3
If it happens on both dipped and main beam it sounds like a simple earth fault.
Main beam, dip and fog share a common earth point so see if your fog light stops working as well.
By 'Driver's' side I assume you mean LH?
If so the earth point is given as ENGINE COMPARTMENT, FORWARD OF LEFT HAND HOOD LATCH
Main beam, dip and fog share a common earth point so see if your fog light stops working as well.
By 'Driver's' side I assume you mean LH?
If so the earth point is given as ENGINE COMPARTMENT, FORWARD OF LEFT HAND HOOD LATCH
Last edited by steveinfrance; 07-14-2012 at 04:38 AM.
#4
#5
#6
Both main beams and both dipped are fed from single relays so the problem has to be downstream of that otherwise the RH side wouldn't work..
The fact that it takes time for the fault to appear suggests it might be at the headlamp end rather than the actual ground tab, specially since you have confirmed it to be good.
Even so I'd check voltage between the earth tab and chassis ground when you have the fault. Your ohm meter is only putting a tiny current through it.
If that's OK then (I'm working from a 2004 electrical diagram but assume yours is similar).
The main headlamp connector should have the following sequence of wires
Pin 1 Red Sidelamp
Pin 2 Blue/Yellow Dip
Pin 3 Blue Main
Pin 4 Black Common dip/main ground
Pin 5 Green/white
Pin 6 Black
So if you can produce the fault and wangle some sort of probe into pin 4 (with it still plugged in) if you get 12V between it and chassis the earth cable is at fault. If you get 12V on pin 1 or 2 depending on which beam you're on it must be the connector.
The fact that it takes time for the fault to appear suggests it might be at the headlamp end rather than the actual ground tab, specially since you have confirmed it to be good.
Even so I'd check voltage between the earth tab and chassis ground when you have the fault. Your ohm meter is only putting a tiny current through it.
If that's OK then (I'm working from a 2004 electrical diagram but assume yours is similar).
The main headlamp connector should have the following sequence of wires
Pin 1 Red Sidelamp
Pin 2 Blue/Yellow Dip
Pin 3 Blue Main
Pin 4 Black Common dip/main ground
Pin 5 Green/white
Pin 6 Black
So if you can produce the fault and wangle some sort of probe into pin 4 (with it still plugged in) if you get 12V between it and chassis the earth cable is at fault. If you get 12V on pin 1 or 2 depending on which beam you're on it must be the connector.
Last edited by steveinfrance; 07-15-2012 at 02:39 AM. Reason: Tidying
#7
Did you resolve headlight problem?
My 06 XK8 has developed a weird headlight problem. After I turn on the
headlights they work for about 5 minutes and then the drivers side goes out.
If I switch to the high beams the same thing happens. If I turn the lights
off then back on they will work for another 5 minutes or so.
headlights they work for about 5 minutes and then the drivers side goes out.
If I switch to the high beams the same thing happens. If I turn the lights
off then back on they will work for another 5 minutes or so.
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#8
Just to piggy back on this thread, I also have intermittent issues with the dipped low beams. Sometimes they work fine, other times they both dip and then rise on their own, usually after about 20 or 30 minutes running time. I guess they could be going off, dropping, then coming back on and rising again. Only happens on the low beams, and then, both at the same time. Interesting, as not all the time, and I cannot seem to find a common surround, like bumpy roads, curves, when approaching a car in front, etc. Just seems random at this point, except for the time before they sometimes fail.
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