On my '70 XR-7, when I went to pick it up from Coyote Classics, the salesman told me that the horn didn't work. It too, was also a rim blow. So when I left the parking lot...I backed up, waved good-bye and honked the horn. The salesman turned to the mechanic that was standing there and he gave him the look of " I thought that you said the horn doesn't work?".. the point is this...I got home and was trying to show my wife about the "rim blow horn" option and it had stopped working. So I sat in the car for a while marveling at things and "remembering when." I had another..and I started to mess with the horn, (trying different areas on the rim blow)... I found three different places that worked just fine. Just wondering if you tried to blow the horn at different places on the wheel. Mine works at just above 3 o'clock on the wheel, 12 o'clock and sometimes between 7-9 o'clock. Here is what I found when I took it apart to investigate the problem. The PO had "glued" the rim blow pad back into the steering wheel and some of the glue had gotten into the rim blow pad, so in my mind that is what was causing my horn issue. I carefully took the steering wheel rim blow pad and with a bit of butchery I able to seperate the two componets, cleand the glue mess up the PO had "gobbed" in there, re-glued it and reimstalled. It has work like a new ever since. Just saying to try other areas on the rim blow before throwin the towel.