Re: Wiring stereo in boat
OK, see if I can help. The red wire will go off the ignition switch terminal and be hot only when the key is turned on. Need a test light. Turn the key on and probe each terminal til you find a hot one. That's one that's hot with key on and not hot with key off. The yellow wire will be hot all the time, so it can go right to the positive side of the battery and the black (ground) can go to the negative side of the battery or if you have a ground bar on the fiberglass boat.It's also possible (and you probably do) have a terminal on the back of the ignition switch that's also hot all the time for the yellow wire. That'll work. In case you don't know,,,,The test light is a tool used to find 12 volt power. Has a pointer on one end with an alligator clip on the other. When checking for 12 volt, clip the one end on negative and touch the pointed end on a terminal or some type of power source. Hope this helps as I've wired alot in street rods and custom cars. Still the same as some of the rods were fiberglass.