My vst gauge is not working. I found a tiny bit of water in my black box but I want to ensure the gauge works as well. Currently my gauge is full down.

I tried the test from but my gauge does nothing. Not sure if its the sending unit or gauge.

Disconnect the sending unit connector plug on the VTS cable.It will have two wires, both brown.One brown wire will have a white stripe and the other will have a black stripe.With this plug disconnected, actuate the boats electrical system.The trim gauge should go full up when the timer is engaged.Connect a wire jumper between these two brown wires.The trim gauge should go full down.If the gauge passes this test it is probably ok.
Does anyone know the required voltage to activate the gauge. I just want to make sure sending the right signal will actuate the gauge.