Lowrance 332C/Gps.
Getting darker colors with some black dots over 6 mph. With the perko switch I can run each battery individually to start boat and run electronis or draw from both batteries at same time.
Unit is hooked into console dash switch and I think I am picking up some electrical noise/interferance.
Can I hook unit so I have option of using one/either/both batteries and still eliminate interfearance ?