1994 Chrysler New Yorker elctrical turns over but wont fire

hi my newyorker has quit on me twice this week.all the dash lights ,check engine etc: and gauges start going on and off the engine dies. the first time it wouldnt start again right away after a couple minuts it fired right up. the second time it fired up right away .i parked it yesterday and went to go somewhere in the afternoon and it turns over fine but wont start.when i turn the ignition on none of my warning lights (check engine etc:) come on. exept once in awile as im turning the key you see the lights (check engine etc:)come on for just a split second when the key is in a certain position. if i try to hold the key in that position to get the lights to come on it wont happen of course.