First time at this so bare with me. For a while now my expedition has had a muted horn only when locking it with the keyless entry Fob 2x's. If you were to just normally Honk the Horn using the button on the wheel it sounded fine. Today the horn stopped altogether. If you press the button on the wheel you get the muted horn and click that I used to only get when I used the remote fob to lock it. I checked the fuse, it was good. I pulled the horns and cleaned connectors at every connection. I can Jumper the horns to the battery and they both work together as dual horns should. I Pressed a vacume handle against the horn button while I checked the connection the horns plug into with a test light, and I am getting power to the connection that hooks to the horn and it read on my meter as 12.36 Volts. OK so here is the real deal, I can hook the little harness the connects the two horns together into the wire that it is supposed to plug into under the bumper, and as long as I don't hook that crossover connection to both horns, eigther horn will work independently of one another. but if I plug both horns in as they are supposed to be it goes back to the muted horn with a click thing. For now I just have the low tone horn hooked up and the high tone connection is just dangleing under there. Have to have the horn so I left it like this so I can pass state inspection soon. Any Ideas guys??? Thanks Bob