Problem With Electrical Distribution

Posted on Feb 6, 2014

I own a 2005 McGregor 26 sailboat. I had a Standard Horizon CP150C installed in my boat. I recently moved my boat to British Columbia, Canada and to my surprise my GPS unit did not power on. Although it is an old model it is brand new. I am the original owner and never had the opportunity to use in the lakes I sailed in the Prairies. I took the GP

Problem With Electrical Distribution
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S and chart plotter for inspection with a Standard Horizon licensed service shop in Vancouver, who checked the unit and found no problems with it. I took it back to my boat and it still did not power on. This clearly indicates that there is a wiring problem. Because my boat is presently docked in a remote place I cannot get an electrician to check my wiring. So I have to find a solution on my own. I opened the side of the cockpit to check the wiring to the GPS plug and [the wiring] looks OK. I went all the way to the battery connections and they also look OK. I visually checked the fuse box connections and also look OK. I am by now completely puzzled about what could be the source of the problem. Any suggestions and ideas to help solve this problem are greatly appreciated. While making a careful visual inspection of electrical circuits is a good way to locate problems which have occurred when there is a clear physical manifestation of the problem, a visual inspection cannot always detect a bad connection. To test an electrical distribution circuit, begin by testing for voltage at the source of the voltage. Move along the distribution circuit with your test voltmeter, checking for voltage at each point in the electrical distribution where there is any sort of connection from the source. You should be able to easily located a bad connection in this manner. One can often find a problem by drawing/sketching a wiring diagram of...

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