Thank you to GraphiteGost, onefundred80, and Pizzaguy for your comments - greatly appreciated. To GraphiteGost - yes I had placed my issue on a thread by sshistand@fuse.net, roughly 42 down the list. Did obtain some great info from the received comments and after following through on those suggestions needed some additional thoughts re the problem solving of the drain issue.Thought that starting a new thread would produce more responses and therefore lead to resolution. From my perspective, achieved the results that I was looking for. ( I am a newbie to the forum)
Yesterday acquired a digital copy of the electrical schematic and plan to review later this week. My saving grace is that the previous owner inserted a cut off switch for the battery thereby isolating the battery. Starting to wonder if he had already experienced this issue of battery drain. Will try to contact him shortly and see where that conversations leads, will also ask if there is anything electrically added to the Crossfire that I am not aware of.
To Pizzaguy - will source out the fluke AC DC clamp on meter, The price may be out of my budget, but finding the leak will possibly be worthy. In the mean time have some research to do prior to a purchase.
To onehundred80 - Planning to source out the 24/7 hot wire connectors, on both the underwood fuse panel and the back to the radio.
Will keep everyone informed, thanks again.