Greetings - my Minn Kota trolling motor causes interference with my Humminbird depth finder. I called and the Humminbird rep told me to use a double ground set up to fix the issue (I tried several other things first before calling). Is there a diagram or description of this type of wiring? Any other solutions or recommendations? They explained it over the phone but there is still confusion. I know I could get a new Humminbird depth finder but I like my existing unit. Note, it works fine when the trolling motor isn't running. Thanks!
Baxter