im preparing for a sub and amp. so i took apart the dash to see how things are wired up and now my 93 4runner wont start.
things i disconnected:
battery
alarm switch
gauge cluster
interior light dimmer
AC switch
dash speakers
head unit

i hooked everything back up and put key in ignition. When I crank it, it seems to wanna start for a split second then DIES COMPLETELY, no power.
after that i'll have no power until i disconnect the battery. When i connect the battery again I'll have power again until I try to turn the car on.

any woud be great!

 

Sounds to me in your playing around under there you knocked a connection loose.
Check everything again

 

If you have poor after reconnecting the battery I would look real

hard at your ground cables.

It is also possible as stated you have a bad connection. on one of the plugs you took apart.

 

I bet your alarm is playing up since you removed power to it. For some reason they do that....well all the alarms I've had on many different cars has played up on me and ended up removing them. Now I just hide a kill switch....
Let us know how you go, please....