Well, I was able to remove the ring and clean up the contact plate. I used bathroom caulk and reassembled it all. My meter showed no continuity between the hub and the plate so I put it back on but had the same problem; the horn honks intermittently with the wheel on. So I removed the wheel and once again removed the ring and plate. This time I used much more sealant to make sure it was isolated. I'll install it in the morning and hope for the best.