You guys are funny
Imon my phone also...was it missing at the same time gage was moving and lights flashing?
I'm guessing here...but do the gaes normally only come on when engine off(no oil pressure) and switch to "run" not start?
What engine? It almost acts like the alt.is locking up or stopping the charge.
Have you checed the battery terminals for corrosion?take them off and look inside clamps.
Sorry need more info on what its in(chevy or?)
So we can diagnos further.
Something is def. Pulling variuos amps random