overide

Hi, I wondered if someone could help me. I have a switch on my bars which has standard boost, boost off and boost on (all of the time even from stand still) but the later has stopped working. I've traced the wires back from the switch(and tested the switch which is ok) and one of the wires goes...

Just seeing if anyone could post a wiring diagram (very clear and easy to understand cause i'm piss poor at electronics). Preferably with real pictures. I have a switch that is already installed near the ignition area. I just need hook up some wires cause they have been taken off. I just...