Hey guys, I really need some help on this one. alright so one night i get off of work and I go to start my fc like norm put the key in switch to acc and my radio comes on then switched it to on and everything cuts out. I take the key out and try it again but this time there's nothing at all. So I sit there for about five min and try it again and it does it like when i first tried to start the car. My head/brake/signal/interior/gauge cluster lights still come on. I've checked all the fuses and they are good. If anyone has any clue as to what's happened please let me know. btw I have already changed the ignition switch.

it's a 91 fc3s turbo

 

anyone?
btw this is my car

 

dead battery or loose battery connections.

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