I wouldn't bother with the switch. I did see in the manual that they have it listed for "saltwater" installations... For the life of me I could not figure out why they have it.Seasparks I have lowrance 3500c. I have two blue connection one to the unit and one to the NMEA cable.Which I think goes the antenna. I am looking at my manual and I see optional power off switch for salt water installations. I do not have that. Should I install? I have an onboard battery charger (promariner charger) What do you think I should do??
I have been around this block once or twiceSeaspark you are the man. I am heading to the boat today to wrap her up. I am also having a problem with my radio which is new also have a new antenna shakespeare do not know # will get it today. Problem is just not receving transmission from long distance. Also changed fron a crimped to soldered connection. Thanks for your help.