Got some GM style horns for the 4runner, mine was missing all together. Problem was that the wiring to the horn button on the steering wheel of the Toyota are hot all the time & switch on the ground, but the GM horn ground to the chassis thru the mounting stud. The solution was a 20 amp relay. Full time hot (from original horn wiring) on 87 & 86 on the relay, gronund from original horn wiring to 85 & 30 to the horn positve. Easy deal & works great.
Then, boredom got the best of me & I ended up cutting my Spatran locker sticker & slapping it on the grill, not sure if I will keep it or not.
Sorry for the lame update, no real mod money to do anything worth wild. At least I am one step closer to getting an inspection sticker. :o