so i picked up one of the older volvo boost gauges from a 240(the black then yellow then red) that had the whole 3 cluster thing and when i found it, it was just hooked up to the vac line so i unplugged that and took it. so since then i've been messing with it and it works fine and the reading are much better to read and notice a diference than my stock gauge.
and now i'm trying to power it to get light behind it so i can se what's going on @ night
my prob is that i don't know how to give it power... there are 3 plugs on the back... the one black connecter ... a metal one that says 1 and another that says 3
anyone know how these should be wired and to what?