It could be the type of wire. Maybe they had a big roll of untinned black wire sitting around??? On my boat very little original wiring remains, it was all untinned and after 3 Bermuda trips it was all turning into black dust ☹
Joe Coquina From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of bwhitmore via CnC-List Sent: Wednesday, July 19, 2017 10:30 AM To: cnc-list@cnc-list.com Cc: bwhitmore <bwhitm...@sbcglobal.net> Subject: Re: Stus-List Negative wire corrosion issues Interestingly, this was never an issue on our 1977 C&C, but that was a Great Lakes boat. Maybe just the difference between salt & fresh water... Thank you, Bruce Whitmore Sent from my Verizon, Samsung Galaxy smartphone -------- Original message -------- From: Joel Aronson via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> Date: 7/19/17 10:12 AM (GMT-05:00) To: cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com> Cc: Joel Aronson <joel.aron...@gmail.com<mailto:joel.aron...@gmail.com>> Subject: Re: Stus-List Negative wire corrosion issues Bruce, They use non-tinned non-marine grade wire in lots of boats. I don't know why the ground tends to corrode first. Make sure you are cutting off enough wire to get to wire that is not garbage. Don't buy connectors at an automotive store. Speaker wire is likely garbage from end to end. You can't test impedance by checking voltage. Learned that one the hard way! Joel On Wed, Jul 19, 2017 at 9:53 AM, Dennis C. via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote: I hope you're coating your connections with TefGel as you fix them. :) Dennis C. Touche' 35-1 #83 Mandeville, LA On Wed, Jul 19, 2017 at 8:49 AM, Bruce Whitmore via CnC-List <cnc-list@cnc-list.com<mailto:cnc-list@cnc-list.com>> wrote: 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<tel:(847)%20404-5092> (mobile) bwhitm...@sbcglobal.net<mailto:bwhitm...@sbcglobal.net> _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated! _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated! -- Joel 301 541 8551
_______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
