Hi Patrick,
What you propose will work but DO NOT do it... Can be a real hazard!!
If on the GPS if there is any metal part exposed that part is now the negative
lead as most all
devices that are for negative ground the shell is at ground. So you do as you
want and the shell
hits any grounded part of your vehicle which is positive you will have created
a
dead short thru
the device and most likely no fuse in the path.
Aside from damage to the device there is a fire hazard!!!!
I do not have a Tom Tom GPS but a Garmin even though the case is plastic it has
an exposed
metal antenna and USB port.
Bob
On 4/5/2011 9:23 PM, Patrick and Caroline Quinn wrote:
> G'day
>
>
>
> In a couple of weeks we are heading in the BN3 to the Australian National
> Rally half way across the continent and will be taking our Tom Tom GPS thing
> with us.
>
>
>
> The Austin-Healey is still positive earth and I have bought a dual power
> socket to fit hidden away behind the dash.
>
>
>
> The socket has black and red wires and an inline fuse in the red wire. The
> case around the socket is plastic and therefore insulated.
>
>
>
> I figure that all should be okay if I connect the black wire to the power
> source and the red to earth.
>
>
>
> Any thoughts on this?
>
>
>
> Hoo Roo
>
>
>
> Patrick Quinn
>
> Sydney, Australia
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