after trying to wire my boost gauge i couldnt get it to work so i went to turn my key and my radio and interior lights and clock wont turn on but everything else works fine

 

Its the fuse with the yellow holder in the fuse box under your hood .

 

you probably have a wire that was exposed and caused the fuse to burn out, as the above poster said. make sure your connections are covered correctly (electrical tape, heat shrink wrap, etc.)

Pulling the fuse out of that yellow contraption can be confusing at first. Pull the yellow thing straight up, it will come up about a 1/2 inch. Don't pull the yellow thing completely off.

GEt some needle nose pliers, and pull the fuse out of the yellow case by grabbing it, pulling, and gently twisting. It'll take a few tries, but it'll come out. You'll probably munch the old fuse, but who cares. You're replacing it!

Hope this helps.