You need to very carefully make sure that the GPS unit receives the expected
polarity and you need to wire the 12V socket accordingly.
The positive voltage needs to be on the center (deep) contact of the socket,
otherwise you'll likely fry the GPS unit. You need to also be careful that
the outside barrel of the socket (now connected to negative power) cannot
contact any parts of the car (positive ground) chassis.
To be safe, I'd put a fuse (1 amp is plenty) in both legs (positive ground
and negative power) of the lines that supply the socket.
Mike
Michael Garvey
1967 BJ8/38046
Swampscott, MA
-----Original Message-----
From: healeys-bounces@autox.team.net [mailto:healeys-bounces@autox.team.net]
On Behalf Of Tom Felts
Sent: Saturday, December 08, 2012 11:34 AM
To: healeys@autox.team.net
Subject: [Healeys] Question re positive ground
Is there any reason that a 12V plug-in that is wired positive gnd wouldn't
work with the plug-in of a GPS unit? Does the GPS unit care as long as it
gets the voltage----seems to me the plug-in is plastic anyway.
Thanks
tom
$12.75
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