Thanks id3m - I've thought about doing that, but I wasn't sure if I'd end up 'busting' something - not so much the Turbine, but maybe the FADEC? Some things like Solenoids etc don't really care about which what the current comes in - if it's there, they actuate. If it's not, they don't.

But, from reading around the traps, there's a few "do's", and a lot of "DONT's" when it comes to the FADEC. Like short the glowplug lead on a JJ, and the FADEC becomes a fancy and light paper-weight pretty quickly. Not knocking those that make FADECS, but surely there's a few electronic 'tricks' around these days that could bullet-proof a shorted lead. It ain't exactly rocket science.

Back to the RPM Sensor - it's basically a magnet that spins on the rotor shaft across a 'Hall Effect transistor', right? Regardless of what it is inside the beastie, there must be something I can do with an 'Industrial Grade' multi-meter that can at least hint to me whether that thing is working or not. Granted, I know I'm not getting a read-out on my monitor, but that doesn't necessarily mean that the Sensor is stuffed. Maybe there's some resistances I could check....?

BJ