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I spray all electrical connections with marine crc, or WD 40 or Corrosion x. All work for me and avoid these corrosion problems.
On 21 June 2019 at 19:11 Dave Ritten <email@example.com> wrote:
Sounds like you should consider applying a “conformal coating” to the PCB. This is like a thick lacquer that prevents corrosion and is a standard process in preparing PCBs for harsh environments. It is s PITA for manufacturers as they have to mask off connectors, relays etc but pretty easy to do on a one off retrofit basis. Most electronics hobbyist stores carry spray cans of the stuff. I had same problem with the rear SAM (computer) module in my Merc and gave a spray coating and no more issues. Hope this helps.
Prospective SM Owner