[DeTomaso] positive ground ?

[Larry - Ohio Time Corp]

Gary,

It would depend if it is using the case ground for any power. By switching
the wires you are putting Pos and Neg in the proper wires. If there is some
way to test it without grounding the case, I would try that first. If it
works you can always install in such a way that the case is not grounded (+)
like on some plexiglass. 



Larry (my 62 MG was Pos earth) - Cleveland

-----Original Message-----
From: detomaso-bounces at poca.com [mailto:detomaso-bounces at poca.com] On Behalf
Of Asa Jay Laughton
Sent: Tuesday, September 10, 2013 4:08 PM
To: detomaso at poca.com
Subject: Re: [DeTomaso] positive ground ?

Gray,
In all seriousness, I think you should call Petronix and find out.  I
don't think you can use it, at all.  Due to the way certain electrical
components work internally, you can't just swap the leads.  The positive
lead is looking for positive voltage and the ground lead is looking for
the null voltage potential in relation to the positive lead.

Someone like SOBill will be able to more accurately answer your
question.  But if it was me, I'd call their tech support line and
explain what I did and see if they say I should exchange it for the
proper one, if there is such a thing.

Asa Jay

Asa Jay Laughton, MSgt, USAFR, Retired
& Shelley Marie
Spokane, WA
******************************     
http://www.racingagainstautism.com
http://www.teampanteraracing.com
http://facebook.com/racingagainstautism


On 9/10/2013 12:55 PM, Gray Gregory wrote:
> I need some help from the electrical gurus out there. I just bought a
petronix ignition module to replace the points in my AC Bristol. It never
dawned on me when I ordered it that like most British cars of the day it is
a positive ground system. So the question is how do I hook this thing up? Do
I just reverse the wires on the coil (red wire to - black wire to +)?  or
install as per the instructions? Or throw in the towel and stick to the
points?
>
> Thanks,
>
> Gray
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