Vehicle & Technical > Defender

Nearside fullbeam - fuse keeps blowing

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Saffy:

--- Quote from: topless matt on September 04, 2009, 06:54:19 ---If you have extra spotlights that work off the main beam feed this can cause it.
I have the same fault and it stopped after disconnecting the relay, havnt got round to re wiring the spotlights yet tho  :doh:

--- End quote ---
aye, I do have the feed to the roof lamp relay(s) coming off the LH headlamp. It was my first port of call yesterday and I thought I would surely find fault there but after disconnecting the feed (it's switched) the problem remained. :evil:

Saffy:
I got the multimeter out today and found that with the headlamp removed and the fuse removed there was still continuity to earth on the downstream side of the fuse connector. Jus t to clarify, this is the blue and slate wire from the fuse connector that runs directly to the headlamp with both ends disconnected there should not be any path to ground!

So starting at the lamp end I hand felt/inspected the loom as best I could for anything obvious - it take a path which is impossible to see/feel all the way, by the time I reached the bulkhead the short had cleared! So somewhere between bulkhead and lamp the loom (specifically the blue and slate full beam wire) is (WAS!) shorting against the body work or earth wiring. I haven't found where that short was and my moving loom a has cleared it and the fuse no longer blows.

I have a good suspicion that the wing at the corner near the bulkhead has worn into the loom from where I have been standing on wing messing with roof rack recently. Even though the fuse should catch a re-occurrence of the fault  to be on the safe side for the moment (until I find the bare wire) I will lay a wire to the full beam from the fusebox and put my own fuse inline.

thanks for advice, got me motivated.

age:
unusually for me, not talking complete bo**ocks then....!  Glad its found/fixable.  A

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