Re: tilt &trim gauge
Install the transducer on the motor if it doesn't have one. Then buy the tilt and trim harness if it is not already installed. At the gauge, there are normally four terminals. +12 volts when the key is on goes to the "I" terminal. Connect that terminal to the "I" terminal on any other gauge. Connect the "S" (trim sender) terminal to the send wire in the trim harness. Gonnect the ground terminal to the ground terminal on any other gauge. Connect the "L" (light) terminal to the "L" terminal on any other gauge. Connect the other wires in the trim harness to the trim switch on the throttle/shift control.