I did all that stuff including running new wire from my starting battery (18 gauge) to the 597 ci hd di humminbird unit. Read in a post here to run 12 gauge wire (reduces line loss). ordered that wire will install when arrives. called humminbird asked what size wire to use for my application. told to use 18-20 gauge wire. sent in unit. waited ten days. called humminbird. they said my transducer was bad. in the mail coming back to me. will see when I get it back if it works. will keep all posted to results. Not a happy camper . fished two weeks now no finder up front.