Pete, welcome back. This is a long shot but I'll tell you what I
experienced on my car this weekend...
I replced the switch plinth and to do that, I had to remove the four
controls on the plinth, one of which is the heater switch. I installed
the new plinth and went for a drive (I actually did a few other things
as well so I went out to test them not the plint install :-} ). However,
I tried the heater fan while driving and I blew the fuse on which it is
wired (no temp or fuel gauge, brake and reverse lights either). When I
got home, I thought I had some evil Lucas problem to deal with (although
the switch had worked perfectly until I took aprt the plinth stuff).
Well it turns out when I reinmstaled the switch after fitting the new
plinth I inadvertently caused a short in it. The cause of the short was
that one of the unused spade tabs on the switch had caught on the metal
dash "underlay" (for lack of a better word) and when I pushed the switch
into poistion this spade tab maintained contact with the metal dash part
grounding out the switch. To rectify, I just removed the swiutch, bent
the spade tab back to a normal angle, replaced the switch and all is
well again.
I hope your probelm is as simple as this. The reason why it might be
related is that I remember now that when I first switched on the heater
while driving, my ignition hesitated a little (very weird for my car, it
is usually pretty good this way).
Good luck,
Peter Zaborski
76 TR6 (CF58310 UO)
Calgary AB Canada
> -----Original Message-----
> From: Pete & Aprille Chadwell [SMTP:dynamic@transport.com]
> Sent: Monday, March 02, 1998 6:10 PM
> To: triumphs@autox.team.net
> Subject: Heater fan switch/ignition kill-switch?
>
>
> Hi, folks!
>
> I've been having some trouble with getting list mail recently, but I'm
> giving it another try.
>
> Thanks to those that helped me get my heater fan operating again!
> Now,
> I've got a new development that is very, very, very LUCAS. Overnight
> the
> fan switch converted itself to an ignition kill-switch. I drove home
> the
> night before and it worked fine. I parked in the garage and the next
> morning when I started her up and switched the fan on, the engine
> IMMEDIATELY cut off. And, no fan operation, either. I switched the
> fan
> off again, started it up, then switched it back on, and it again cut
> off
> instantly. I touched NOTHING. I'm still driving it, and it is no
> less
> reliable as long as I once again live without the fan. This all
> happened
> TOTALLY spontaneously. I hadn't been tinkering with ANYTHING.
>
> Any of you electrical wizards out there got any ideas about how in the
> HELL
> this could happen!!??? It just seems far too freaky for ME to figure
> out!!
>
> Thanks as always!!
>
> Pete "I'm Back!" Chadwell
> 1973 TR6
>
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