BIG problem, electrical guys, help me out -suggestions needed Options

[Batman722]

I have a friend (I posted about him here and now there are more problems.

this is what is happening (sometimes, just more lately)

94 GT auto, sometimes when you try to start the car, it starts, but none of the gauges work, nothing lights up (clock and radio) and he cannot get it out of park. It seems like when he turns the key, it doesn't turn the car "on" it only starts it.

and if he is sitting at idle in park, the battery light comes on, all of the gauges stop working, ect... and he cannot get it out of park.

my best guesses are

that there is a short somewhere
soemthing wrong with his ignition

things I have checked
all fuses, battery cables, alternator is fine, battery

wtf do I do now ? what should I check ? has this ever happen to you ? I am at a loss right now...

thanks guys