Hi Jim,
Had a similar problem, and in the end traced it to a faulty earth on the
firewall near the horn relay...
It cam loose, giving this sort of intermitent behavour
Jim Muller wrote:
> Okay, folks, here's an interesting behavior that begs a solution.
>
> Every so often when I turn on my Spitfire ('80) headlights, they simply
> don't come on. Passing through the parking lights position on the switch
> turns them and the dash lights on, but then all goes blank when I keep going
> for the headlights. Turning everything off and back on again brings
> everything to life properly.
>
> Now, I always assumed it was due to a flaky light switch, perhaps dirt
> inside or a poor connection. But this weekend it did something else
> entirely. While driving home one evening all had been working well. But
> once, when I switched on the high beams, all went dark. I immediately
> turned everything off and back on and lo! all was light again. It sure made
> me reluctant to try the high beams again.
>
> So what would cause this? If it was a bad connection in the switch, why did
> it blink out when I engage the high beams (only)? Surely they don't have
> two separate wires comming off the light switch, do they? Would a poor
> connection, poorly seated fuse, weak ground, or other wiring deficiency
> cause this sort of thing?
>
> Thanks!
>
> Jim Muller
> jimmuller@pop.rcn.com
> '80 Spitfire (Percy)
> '70 GT6+ (Nigel)
--
Tim Dafforn
University of Cambridge
Structural Medicine Unit
Cambridge Institute for Medical Research
Wellcome Trust Centre for Molecular Mechanisms of Disease
Hills Rd, Cambridge CB2 2XY.
UK
Tel. (01223) 763230
Fax. (01223) 336827
http://smokeroom.cimr.cam.ac.uk/
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