<strong>Yahoo Message Number: 16946</strong>Gary,<br/><br/>In your front left compartment, ahead of the driver, is where the air switch is you are looking for. There are three switches in a row, and I think the switch you need has Ckt. #20 going to it. Anyway, those switches are for "Low Air" pressure light, "Parking Brake On", etc. The older switches use case as ground with one wire, the new...