No sequence that I can recall before the fuse pops. I'll try the door lock suggestion. Just had both panels off to replace the little plastic clip that holds exterior door handle the the locks. Both sides broke within a week. AND no, not the cause of the problem, fuse popping long before the clips broke. My friendly Toyota/Lexus dealer told me I could not buy the little clips, had to buy the whole door handle assembly. He "generously" offered me both handles at cost-$150 each.
One of the local Lexus repair shops said, "while it is true you can not buy the LS 400 clips separately, you can buy SC 300/400 clips separately and the clips are identical."
Off to start locking doors, then opening/closing the trunk (the only two things we did regularly that might "cause" the overload... never did turn on the dome lights, except to check if the fuse was blown. Thanks for the suggestions. Getting closer to parting the car out. Shame because we have gotten to most of the common aliments on 1993 LS 400 (rebuilt/re-soldered dash lights, two alternators, power steering pump, whole steering system, re-flashed the main computer board twice, redid the whole front of the engine, new radiator, just to name the main fixes).
Starting to think my 2007 IS wheel and tires are worth more than the car, but not giving up yet.