My truck has a dual horn setup that I haven’t seen in any of the manuals. I have installed an American Autowire stock replacement harness which includes a horn relay. I’ve attached a picture of what I have. Please note that there is a relay between the two horns. The AAW harness has a wire that is connected to a wire on the horn assembly. The horns don’t work, so I’m wondering what it is that I have here. The truck is just about ready to drive after at least 25 years of being in pieces. I do remember that the horns used to work. Any thoughts or questions are welcome. Thank you, Larry