94 mustang gt convert electrical problem computer?

Hello I have a 94 gt convert I got at an
auction for $750. The day I won it we
started the car and it fired right up weather
was maybe 75 ish out drove the car back
and any time you accelerate all the dash
lights start going on and off flashing etc
and the speedo was maxed out well
parked the car then about a week later 50
ish out side I whent to go and try to move
the car hard time starting finally got it
started then died after 25 seconds or so
and wouldn't fire back up even tried
starting fluid then the next day was
messing around trying to start it I held
throttle down and it tried to start on first
crank but then whent back to not fireinf
waited 5 mins tried and it fired right up ran
for 10 mins (really ritch) and died and
would not start but I noticed the convert
top finally worked didn't work anything
before and every time I gave it gas the
airbag light would blink I have no idea what
the heck this could be could i be the
computer maybe hopefully lol i really don't
want to have to trace the bad electrical
and all the fuses work besides one for the
convert top there is no power to where the
convert top fuse goes any help or advice
would be greatly appreciated thanks!!!