Need help finding this issue, so a couple of months ago I took my 1988 Firebird 305 Tbi to the drag strip and made probably 9-10 1/4 mile passes... after this the horn, dome light, kick panel lights, radio, hatch motor and door buttons all quit working! What happened? Is it a relay? Or set of relays that blew? I have zero knowledge of any fuses that blew either. Where should I begin to look for the resolution to my issue? Thanks I’m advance!

 

Fuses under dash and possible fusible link down at starter.

 

Those things are all on the ACC fuse for accessories. It's probably blown. If you replace it and it blows again it is often due to the lighter receptacle shorting out. Just taking out the lighter wont help at all. If the fuse does blow immediately you have to disconnect the socket in the back. If that fixes it either leave it unplugged or replace the socket. If left unplugged, beware that orange wire that powers it is always hot and needs to be insulated so you don't fry the car. Happy hunting!