[Healeys] illuminated toggle/push pull switches My Two Cents

[Skip Saunders]

Ground switching was done on the Healey's too....anyone want to discuss how
the horns are wired?...(and they are pretty high amp devices too.)
-skip-

-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at autox.team.net]
On Behalf Of ggilliam at usol.com
Sent: Monday, November 01, 2010 9:59 AM
To: Jack Feldman
Cc: healeys at autox.team.net
Subject: Re: [Healeys] illuminated toggle/push pull switches My Two Cents

Ground switching is very common in modern cars and computer controlled
systems. One obvious application on many cars is the dome light. The switch
on the door jam is a single wire switch to the car body...provides the
"ground" for the lamp.

 Gordy

On Mon, 1 Nov 2010 07:33:08 -0500, Jack Feldman <qualitas.jack at gmail.com>
wrote:
> It has been an interesting thread, but a scary one. THE SWITCH MUST GO IN
> THE POSITIVE LEAD. Any electrician or Radio Amateur with kit building
> experience will tell you so.
> 
> First, the fact that they don't sell negative working switches should be
a
> clue. Second, if you look at the electrical code for your house, at least
> in
> the US, you will find it is illegal to put the switch in the neutral, or
> grounded lead. The switch must always be in the hot lead. I can't speak
for
> other countries, I know they do things differently in England, but I'm
not
> sure that extends to switching the neutral.
> 
> If you are adding a switch, it is easy to put an inline fuse in the
> circuit.
> The holders are inexpensive and easy to crimp of solder. Soldering being
> preferred.
> 
> One person in my club added a fuse block for bladed fuses to his Buy-Eye.
I
> had a mechanic to the same for me. I bought a block with LED indicators
to
> show when the fuse is blown. The LED is in parallel to the fuse so it
only
> works on non interrupted circuits.
> 
> If I sound too harsh, please accept my apology, but I would hate to have
> anyone's beloved car burn up because of improper wiring.
> 
> Jack
> KA9HEL
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