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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