From: "Larry W4CSC"
Subject: Boat Stereos
Date: Monday, May 30, 2005 4:49 PM

You are right that's nothing but a car radio. They all are, otherwise
they'd be SEALED UP so they wouldn't get wet. It's got a white face,
instead of the car black face. Woo woo...(c;

There are two + wires. One of them must go to 12VDC continuously to hold
the memories. This means you must hook it to 12V that you do NOT shut down
when you turn off all the DC breakers and leave the boat. Otherwise you'll
have to reprogram the radio every time you do. Not good. The other wire,
probably marked "ignition" is the switched wire for turning the radio on
and off with the car ignition switch, so the radio shuts off when you stop
the car and get out. Not an issue in a boat. When I wire them in, I
connect both + wires together and connect them to a continuous 12V
connection so you can run the radio at any time, no matter what the
breakers panel and "ignition" switches are set to. You'll know when it's
on because you can hear it...(c;

Be sure to fuse the wire(s) that go directly to the battery. My policy is to
only run the memory lead through a small fuse to the battery. The ignition
lead and the panel lights go through the normal switches and breakers so a
stereo left on all winter does not drain the battery.
Doug K7ABX