i had the same problem as ocozkid you just blew a fuse i think it controls door locks keyless entry and your dome light.. the fuse isnt easy to get out of the yellow holder thingy, should be a little red 10 amp fuse....

 

how do i get the fuse out of the yellow thingy? how did you do it?

 

there is a fuse remover(kind of looks like tweezers, those would work to), on the back of the storrage thingy that is bellow and to the left of the steering wheel(just below the dimmer switch). there is also a spare 20 amp fuse back there, thats what i used. it wasnt necessary but it worked.

 

I FINALLY GOT MY HEAD UNIT ISTALLED AND EVRYTHING IS BACK TO NORMAL.... THANK YOU EVERYONE WHO HELPED ME OUT.

MAYBE I'LL HAVE THE CHANCE TO RETURN THE FAVOR.