A horn fuse blew out, and I dont know which one it is...

[yourdeathwish]

I was installing an amp and sub in my truck and then my headset died, after I saw a little spark. Then I realized my horn doesnt work and neither does my cigarette light charger thing. The problem is...I dont know what happened to my manual and I have no idea how to get to the fuses or which one to take out...OR even which one to buy all because I dont have my friggin manual can someone help me out? I got a 89 s10.

[jackass#1]

fuse box is in drivers side under the dash. the fuses are labeled. and if not check them all and replace the ones blown.