are these things running of the same fuse and if so where the hell is it?

 

i had the same problem on my 88 n/a .......lets start with the clock,take aparts and resolder all the pins on it .......the fuel gauge ...replace it and the horn is that little pin in the steering wheel is probably worn out!

 

No the horn is controlled by the cpu which is near your fuse box you take it out and resolder it just like you do for your clock on the warning lights cluster <- resolder it

 

The cpu is on the drivers' side behind the kick panel, there's a good write up on how to resolder it. Do a google search on "cpu cold solder" and you'll find it. I just did this not too long ago. Clock, etc. works great now.

-W