Trim Gauge Wiring

Hi Kevin,

I am in the middle of a pontoon boat rebuild and need your boat wiring expertise.trim gauge

Part of my project included adding all new gauges – including a new trim gauge. Could you please tell me what I need to wire it properly?


Hi Steve,

Here is the typical wiring for a pontoon boat trim gauge:

  • Keyed power (usually purple) to the + terminal on the gauge
  • Ground (usually black) to the – terminal on the gauge
  • Sender (usually brown/white in engine harness) to the S terminal on the gauge
  • Lights (usually blue) to the LT or light tab on the gauge

Hope this helps