+ or - does it matter? My wiring diagram says yes - but the tranducer has 2 orange wires and one ground so maybe it doesn't. Any thoughts would be most welcome, thanks.
Nigel, it's a B&G Focus unit, with a log/temp gauge input from one hull fitting and depth /echo sounder from a second. The log /temp is straigtforward - lots of coloured wires - but the transducer (depth) has only 3: 2 orange, 1 ground.