Hello, We took over ownership of a 1994 C&C 37/40+ about 4 months ago. At that time, we knew we had a battery issue. As it turns out, after we replaced the batteries, we found that one of the battery banks was still not showing enough voltage getting to the panel. I immediately suspected a bad ground, and when I went to tighten it, the ground cable made a crunching sound/feel when I pulled on it. I immediately replaced the ground cables, which fixed the problem. As I continue to address other electrical issues (lights and pumps that don't work, rotted speakers, etc.), I'm finding that in most cases, the negative wire at the far attachment to the appliance (speaker, pump, light, etc.), tends to be corroded. Usually just green on the inside, but still usable, but in some cases it is requiring me to splice in a piece of wire a few inches away. In one case where there is a light in the closet of the forward cabin, I will probably have to rewire with a new light due to the wires breaking through. Is this "normal" corrosion (the boat is in salt water), or is there a particular cause for only the ground wire to corrode? Why is it not happening on the power wire as well? Does this indicate other issues I should watch out for? I'm not seeing pink discoloration on seacocks, don't see issues on the engine, etc. Thanks in advance, Bruce Whitmore 1994 C&C 37/40+Madiera Beach, FL (847) 404-5092 (mobile) bwhitm...@sbcglobal.net
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