I stayed positive ground but the prior owner had gone negative with an
original radio he could not figure why did not work. When I had the car
apart I notice a polarity switch on the back or side that said
positive/negative so you could go either way and still use your original
radio as well. He ran the car more than a few years as negative ground and
then I switched back. Radio works fine.
Dan
-----Original Message-----
From: healeys-bounces at autox.team.net [mailto:healeys-bounces at
autox.team.net]
On Behalf Of Greg Lemon
Sent: Thursday, May 26, 2011 12:38 AM
To: White, Stephen; healeys at autox.team.net
Subject: Re: [Healeys] matching
I don't think you have much to worry about, the rest of the ancillary
electrics don't "care" if they are positive or negative ground, lights
doesn't matter, heater blower motor doesn't matter, wipers, blinkers ditto.
If you have a modern radio this will be an issue as it will be negative
ground, if it has an original period radio probably positive, but worth
checking (not sure how, unless it has a polarity switch or is marked on the
outside somewhere).
The coil will work both ways, but better if the small "+" "-" wires are
hooked up right, if this is part of the motor with "generator everything"
that has been set up positive earth you should be there too.
So the only thing you might blow up is your radio, if you don't have one you
should be able to just hook the battery up positive ground and you will be
good to go.
Later cars have an eletric tach which needs to be worked on too, but yours
is still mechanical, so OK.
Greg Lemon
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