basic problem...but got me scratching my head???
My rear fog light doest work....done all basics, swapped for a known good bulb, checked for 12+ volts at light when switch is on - all good.
Replaced whole unit with new fog lamp (cough LR unit - until fixed!)...still nothing??
When I test for resistance with my test meter (lamp removed) I get an open circuit?
what is going on?
h :?: e :?: l :?: p
Forgot to add - someone has played alread and installed a second earth lead to rear door.
Check your earth ciruit or wire in an alternative earth from the bulb to the body directly, touching your wire on... say the stricker on the body. If your bulb lights up, this will confirm no earth circuit.
Regards,
Hi when you metered the bulbholder did you do it with the bulb insitu?? or did you bring an independent earth to the side of the bulb. could be no continuity between the earth connection on the lamp assembly and the bulb holder.that is assuming that the base contact is live at the point the bulb touches it....
Hi Fixwin,
tested this and all seemed fine. Just to be sure, swapped out whole foglight with a new one, still nothing (wired new light into a cigarette lighter plug) works fine???
.....???
Try supplying your bulb an independant supply of power and earth, if it does not work, it is quiet possible, that that buld is dud, this has happened to me in the past also.
Also, remember that the point of contact on the bulb is small, using a small tipped s/driver, scrap the contact electrode and put some tension on the contact strip, loose contact and a small surface oxidation will cause a problem.
I would check the fuse contacts also, although you register 12 volts or battery voltage, the moment current passes through there is a break in the circuit. This pointing to a loose and dirty connection some where, check battery terminals of oxidation, if need be claen and apply vaselin on the terminals.
Thanks for all your help - now sorted.
It was contact point of bulb locating lugs into bulb holder so spot on Fixwin38.
(and landrover part is duff even when new)
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Hi Rakesh, you come to my help once again. Thank you.
Using the existing earth into light and +feed - the voltage measured is 12+volts. As you said somebody has already wired in a second earth to rear door...again all works voltage wise.
It's just the bulb won't light (and it's a good buld definately).
Is it something to do with a high resistance? can you have full voltage but high resistance causing this problem??
I thought I understood car electrics but this has me puzzled??
regards Andy.