Sounds like its not charging the battery. When you use up the charge then there is nothing to make spark to fire the plugs. To put it a simple way.
could your alternator be playing up
the sudden load might cause the engine to stop
that would explain the battery being dead
perhaps consider a short aswell
get a meter, test the alternator
http://www.todayifoundout.com/index.php/...
"Ax"? Are you asking about A/C ( air conditioning ) perhaps?
Don't turn the "ax" on, whatever that is.
I have a 1976 f100 and every time I turn the ax on the trucks shuts off and won't turn back on until I disconnect the battery cables and charge the battery for a couple hours and if you try to jump start it it won't work is there a reason why I disconnected the ax compressor and it still has the same problem