Ok folks here goes on the last of my dash gremlins (for now anyway!) All the gauges work in my '85 QV except for the Oil Temp. I have replaced the thermistor with a PN# 24618025 from Superformance, as well as a new gauge itself and nothing changed. Dash lights work (so I have power and ground on the Yellow terminal), and I have 12v at the Green/White (+) wire. That only leaves the Brown wire which *appears* to be a straight shot to the thermistor itself according to the diagrams. If I ground the brown terminal at the gauge, the needle pegs. That would suggest the gauge is working. I have tried to ground the brown wire at the engine side but nothing happens. Re-reading some posts it sounds like it can be hard to find good ground down there so I may try again. Should there be some sort of power reading coming off that brown wire? I haven't tried a voltmeter yet but I'm wondering what kind of signal I should be expecting off the back of the gauge in order to test the brown wire. I presume it has some sort of (+) power coming from it. Thanks again!