This is actually a pretty easy project, you have to figure out how the fuse panel is set up as far as where the power comes in from the battery and how it gets back. Using a digital voltmeter, you can see where you get 12 volts and which is the pos side and which is the neg side. On mine all the fuse receptacles were filled but there were spare terminals on the pos and neg side. So the way I wired it up was use a fuse holder attached to the pos lead, and crimped on a terminal to the end of the fuse holder wire. This gets put on the pos terminal on the fuse box. The negative lead from the chart plotter also gets a crimped on terminal and gets attached to the neg terminal on the fuse box. They are sometimes on opposite sides of the fuse box. The way to tell which side is pos. and which is neg, is to watch when you hook up the voltmeter probes. If it reads +12, then the terminal you have the red probe touching is the pos, and the one you have the black probe touching is the neg terminal. If it reads -12V then its the opposite. The more challenging part is mounting the transducer if the plotter is also a sounder (depth finder). For that you have to install a transducer (either on the transom, or in the hull of the boat if the hull is not cored). If its a cored hull you can't use a shoot thru the hull model. You have to drill a hole in the transom to run the transducer wiring up through the the transom to the plotter unit. Make sure to seal any holes well with marine sealant.
_________________ 88 Four Winns 200 Horizon 4.3 OMC Cobra-4bbl 2002 Walker Bay 10/2012 Suzuki 2.5 2008 Walker Bay 8
1998 Jeep Grand Cherokee 4.0/Selectrac 2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II
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