Solved: trim gauge - E-NATION The best part is you do not need a wiring diagram. All you have to do is hook up the three wires that are under your console in the keyswitch wiring harness, black wire to ground terminal on the trim gauge, purple to the Power or " I " terminal, and white-tan to the sender terminal. Related searches for trim sender wiring diagram trim position sender wiringtrim gauge wiring diagrammercury trim gauge wiring diagrammercruiser trim sensor wiring diagramboat trim gauge wiring diagrammercruiser trim gauge wiring diagrammercruiser trim system wiring diagrammercruiser trim limit wiring diagram