Fried heater cable is usually because the earth strap(s) from engine to
body are not conducting properly.
I have two on my GT, and check their fasteners a couple of times each
year.
Bob
> On May 31, 2022, at 3:47 PM, <h.duinhoven@planet.nl> <h.duinhoven@planet.nl>
> wrote:
>
> Oh that darn heater cable again - it made a short in my GT as well after it
> went lose from its control position!
>
> -----Oorspronkelijk bericht-----
> Van: Mgs <mgs-bounces@autox.team.net> Namens Steve Shoyer
> Verzonden: Tuesday, 31 May 2022 10:09
> Aan: mgs@autox.team.net
> Onderwerp: Re: [Mgs] 80B, melted white-green wire from ignition switch
>
> Thanks to everyone who replied to my question. I think I understand what
> probably happened. I think the bullet connection between the white-green
> feed to the radio and the radio's wiring harness (which had an inline fuse)
> must have loosened and allowed the bare connector to short to ground,
> possibly on the heater control cable. When I removed the radio, there was no
> longer continuity between the white-green connector coming from the ignition
> switch and ground. I replaced the ignition switch with a new aftermarket
> one, and I also replaced the radio. The one that I had been using seemed
> fine, but it had a CD player so it was about 6" deep. I picked up a new one
> without a CD player (a Jensen unit with Bluetooth for $36) that's less than
> 2" deep, so there's a lot more room behind the radio and it should be less
> likely to cause strain on the wiring. This radio uses the same style of
> wiring harness as my old one so it was an easy swap. Nothing melted when I
> tried the new switch and
> radio, so I think I'm good now. I might try to use a zip-tie to hold the
> radio wiring in place and reduce the possibility of pulling the power
> connection apart. I put in a 5A fuse for the switched power rather than the
> 10A fuse that came with the radio, hoping that it would blow quickly if there
> was a short somewhere in the circuit that I didn't see.
>
> --Steve (1980 MGB)
>
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