Ronnie, Thanks, that helps a lot. I'm impressed that you remembered the RMI Monitor. John Ronnie Brown wrote: > Are you sure it is a pressure switch and not a sensor? I would think that > your RMI Monitor came with an analog pressure sensor made by VDO. > > Try http://www.egauges.com/vdo_sgrp.asp?Subgroup=Pressure_Sender and see if > you can find a match to your sensor. > > Ronnie