I went to start up my 04 tonight and within a half a second of my crank attempt, everything went dark. now i have no electrical power. nothing. anyone got any thoughts?

 

Fusebox under hood. Look for the bolt in fuse links. Or a battery lead fried off.

 

Try twisting the cables on the battery posts. I've seen them be loose, build up corrosion, and suddenly go dead, twisting the cables cleans the corrosion off. (if this works, then remove the cables, clean the clamps and the posts and reattach them tightly)

 

Mine use to do this all the time, see if you can twist your negative battery cable at the post. If so see if you can tighten it, if not this is going to be a re occurring problem for you. Just give it a twist and you should be able to start it. Its kinda embarrassing when you've been talking up your friends telling them how awesome your discovery is then go to start it and nothing, lol. New terminal and it should fix it...worst case a new battery...even worse new alternator.

 

Happened to me quite often but ONLY after trash talking a friend's Jeep. Loose battery terminal.