I retouched and cleaned up all the solder connections on the RCM as well as inspected/cleaned the contacts of the relays and that did not help (I didn't think it would, but I feel better now). I also put the RCM on the bench and hooked it up to 12VDC (Power to D2 and Ground to B5) to check continuity after the 2 relays (Traction and Engine Control) close and everything works as expected per the diagrams. I feel pretty confident that I can call the RCM good.

Looking at diagram 8W-10-21, the next step in the path goes from the Engine Control Relay to the C5 connector on the Powertrain Control Module (PCM). I disconnected the C5 connector from the PCM and checked for continuity from E6 and E4 of the RCM to the PCM C5-9 and C5-3 respectively and the wires checked good. Did some wiggling of the wires in the C5 connector to make sure they were seated tightly in the connector and they were good. Inspected the mating connector at the PCM and it looked good as well. After all the inspection, I plugged it all back together and checked for 12VDC at C5-3 and C5-9 with the key on and that checked good. I tried to start it one more time and the car cranked (starter engaged) for about 1/2 a second, acted like it wanted to fire and then stopped cranking. I tried again and got no starter engagement. Disconnected the C5 connector again, wiggled/pulled all the wires in it again, plugged it back in and got the same result - 1/2 second started engagement and then nothing. Looking at the C5 connector, there are 4 ground wires in it - locations 5-8. I am thinking that I have an intermittent ground happening here. Those 4 grounds go to location G101 which is behind the windshield washing tank.

So, my next step will be to really look at that ground location, clean it up and make sure there isn't an intermittent problem there. Also, the C5 connection is a "spade" type connection and with my naked eye in the dim light of my garage, it looks like the female (socket) side of the connection at location 7 ~might~ be a bit wider than the others. I'll see if I can tighten that one up so it clamps on the spade tighter.

I'll let you know what happens.

Randy