Question:
will the controller light up without trailer plugged in and power turned on with motor running
asked by: James F
Expert Reply:
Curt TriFlex Trailer Brake Controller # C51140 will light up with no trailer connected and the vehicle on. There will be a single dot with no trailer connected. You can see the various things the brake controller can display in the instructions which I have linked for you.
Curt TriFlex Trailer Brake Controller - 1 to 4 Axles - Proportional
