Thread: help me install my boost gauge!

The orange wire is an optional hook-up that will dim your gauge when your lights come on. I spliced my orange wire to one of the wires going to my fog light switch. It must have a full 12v signal, not a variable voltage that changes with your dash lights. A switch may be easier, but the results won't be as professional.

Originally Posted by triebenbach07

The orange wire is an optional hook-up that will dim your gauge when your lights come on. I spliced my orange wire to one of the wires going to my fog light switch. It must have a full 12v signal, not a variable voltage that changes with your dash lights. A switch may be easier, but the results won't be as professional.

if it had a full 12v signal, wouldnt it have lit up right when the ignition is turned over? I couldn't get the gauge to light up at all.