Horn trouble

2002 Ford Explorer XLT approx 85,000 miles. Horn stopped working about a month ago, after being towed, while we were out of town, long story short, they couldn't reach us and I don't know how they got the horn to shut off. We assumed they just pulled the fuse and didn't try to fix it until last night, well, no such luck, that is not what happened. We can't locate the number and can't remember the name of the company that towed it to call and ask how they dc'd it, HELP :shock: We've searched the engine over and can't find any unhooked wires, all the fuses are in working order, what else to do?