Where is the horn and its wiring located on the 1988 Toyota pickup because it keeps honking randomly when I'm not pushing the horn?

read up on the circuit...does the truck have an aftermarket alarm? may be the alarm, but probably a worn contact ring in the steering wheel... everyone should have a manual for their vehicle, and a professional shop manual should be available at the library in the reference section for FREE...make copies of the right pages and fix your vehicle like a PRO! :) good luck Dave :)