OK thanks, I had already planned on parts swapping as a way to troubleshoot it. I was just wondering if anybody knew of any stand alone test that could be run on the ECU while I was waiting .
but meanwhile, this has happened in the last hour...I had taken my ECU out so I could swap around with one of my Jeep club members later this evening.
while I was waiting for him and his Jeep to come over after work, I decided to clean and grease the connection on the ECU. Just on a whim I plugged it back in to give it another try....and Hooray!! the Jeep started!!
I guess it was just a bad connection at the ECU.
the $10 I spent on electrical contact cleaner and a big tube of dielectric grease saved me from buying a $150 ECU, like my Jeep club friends said I would need to do... or the need to swap parts around with another Jeep this evening to troubleshoot it. Needless to say I'm one happy camper tonight