I heard that with the current reversed like that you can still use the GPS
as long as you remember that North is now South and East is now West.
Seriously, there's a navigation system you can use with either negative
earth or positive earth! It's called Most Accurate Position (MAP). ;-)
Cheers!!
Jim
On Mon, Jan 11, 2010 at 10:42 AM, Hal Faulkner <frog.aye@gmail.com> wrote:
> Skip,
> It won't know. HOWEVER, you will have a potential for shorting the battery
> voltage to ground. Most modern accessories such as GPS devices iPods, etc
> are well insulated, but the potential does exist that something might get
> plugged in that has a metal part that is nominally grounded, if that should
> touch any metal part of the car.... Do you enjoy fireworks? Of course,
> fuses will keep the danger down, but if you keep blowing them they're no
> fun
> either.
> Hal
>
>
> On Mon, Jan 11, 2010 at 8:25 AM, Skip Jackson <jackson.skip@yahoo.com
> >wrote:
>
> > I was planning to install an old Jag cig. lighter into my BE to power GPS
> > and
> > cellphone. Now I read that the GPS will not like the positive earth.
> > Can't I
> > just reverse the wires. How do the GPS know? Skip J.
> >
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--
Cheers!!
Jim
In my many years I have come to a conclusion that one useless man is a
shame, two is a law firm, and three or more is a congress."
John Adams
US diplomat & politician (1735 - 1826)
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