I'm wondering if the dual horn is pulling the right amount of current? Did you install both at the same time? Seems like those that intsalled just the airhorn are having issues...I did not keep the stock horn.
I did use the provided relay and upgraded wire. So far no issues.
I wonder if they upgraded the computer system and diagnostics from 18 to 19? Yes, 12g to the 30A 5-pin relay and compressor. Pretty sure my issue is the original horn wires going to the relay. My dealership said good luck, the bikes computer monitors everything, making it difficult to modify stuff. The only thing I have not done yet was put a 30a fuse inline, but that shouldn't affect the low voltage side, would it?I installed the air horn first and had it alone for a couple of weeks. Then added the duals.
Did you use the larger gauge wiring?