Well, I sucessfully built a bench harness, have a TCM connector, need to find an LLY ECM connector still, anyway, for testing, I used a Werker 7.5Ah Sealed battery, and hooked my meter in to read current. The TCM drew .365 Amps during reading and powered on. Turn the "ignition" off, and it drops to .265A, then ~30 seconds later, drops to nil (when the TCM turns off). Not a very high current. So for normal use, should I get a new 7.5Ah sealed battery and use that, or should I use the "Wall Wart" AC Adapter that delivers 12.53VDC with no load, and is rated to deliver 3A? Or should I go out to Radio Smack and get a 13.8VDC 3A Power Supply?