Larry and TP,

I will heed both your warnings. Will wait for the cooling radiator repair to be complete, re-install and run the engine.

Will then check voltages at the compressor at least, and if not present, I'll bring it to a shop for diagnosis, and probably spring for a charge if they say it will take it.

I must say I wouldn't have even thought to investigate the system, much less invest in it if not for the success I had in following advice on the cooling system (big thanks to Benzguy). But now it's got my attention, and if I can get the pro work done (pertaining to the lines and refrigerant), I know I can handle the electrical component side.

I do pledge to keep my progress updated here.