Big possibility on that. Out of frustration today, I puilled the RCM out of the box and tapped it about 6 times on the heat shield ... and the damn thing started!! Let it run for about 10 minutes and shut it of and it went back to the mystery no start symptoms. Not sure if me tapping it on the heat shield or moving the wires getting it out of the box triggered the start, but no amount of movement or tapping after that allowed it to start again. I pulled the cover off of the RCM and looked at the solder joints on it and saw some that could use a little cleaning up. They may be good, but I work in the aircraft industry and some of the solder joints would not pass (flux left on the pads, too much solder on some, non uniform, etc). I always think the inspectors get too picky when they critique my soldering, but now it's ingrained in me when I look at finished solder jobs. So, since it doesn't cost me anything, I am going to clean up the "suspect" solder joints and go from there - actually, I am going to touch all of them for good measure. I'll do a good inspection of the relay contacts while I'm doing this and make sure they are clean. If that doesn't work, I'll start tracing all the wires and connectors that go to the RCM and see if there is a failure of one of those.

But, like you and Dave said, I am really thinking the problem is near the RCM.

Thanks again - I'll keep you all posted.

Randy L