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Author	Topic:   Electrical hook-up for a Sci-Tek Chart Plotter
brucemac	posted 06-24-2007 07:38 AM ET (US)         HI, I have a 22 foot 1980 Whaler Revenge i/o. JUst bought a sci-tek Navmate chart plotter. Wiring diagram shows red wire to power, black to ground, as expected. I wired the red lead to a terminal (on the power block behind the helm console) on the red side, beyond a fuse ( ie fuse is in the circuit). The fuse looks ok. I wired the black lead inot the ground side of the power bar. However, with this wiring, no power arrives at the chart plotter under any condition. Any thoughts on this? Regards, Brucemac
Chuck Tribolet	posted 06-24-2007 09:19 AM ET (US)             Do you know that you have power and ground on the bus bar? Do other things attached to it work? Have you checked it with a multimeter? Chuck
bluewaterpirate	posted 06-24-2007 11:30 AM ET (US)             Check the fuse .... make sure the fuse holder is securely snapped shut. That glass fuses are the weakest link in your connectivity. Tom
brucemac	posted 06-24-2007 09:29 PM ET (US)             Thanks for the replies. I ow have a further mystery re sci-tek plotter. I got it up and running by checking the fuse in the circuit I had chosen, (pretty much at random since it was one with not too many connections) and the fuse was broken. I replaced it with a 30 amp marine fuse and presto the plotter came on. The situation was that I was at the dock, and had the battery switch turned to both batteries. Things were golden. I worked with it for a while learning some of the features. I shut down and left for a few hours. When I returned I fired up the boat and took her out, I mounted the plotter, pressed the power button and I got nothing. I Checked the fuse and it is OK. So I unpowered the thing, hoping that I hadn't somehow fried it. When I got back to the dock, I shut down the engine, left the batteries on, tried powering up the sci-tek and I got nothing. Fuse is OK. Connections OK. Any thoughts on what might be going on? Regards, Brucemac
Chuck Tribolet	posted 06-25-2007 08:39 AM ET (US)             This isn't your problem, but 30 Amp is probably too big. You fuse based on the wire size, and 30 Amp is appropriate for about 10 ga wire. As far as your current problem, the stuff in my prior post still applies. Chuck

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