The 10a fuse was blown. I replaced it and then hit the horn. Briefly had sound, which quickly stopped. Checked the fuse and it was blown again. Put a 20a fuse in...hit the horn and it worked. Took it for a spin and the cruise worked too. I know this isn't the best fix and I'm sure some will tell me that I just temporarily hid a potential problem, but for now, I'm happy. It's been 6 months and no other issues with any of the steering wheel-area electrics. The volume controls don't work, but that's due to the aftermarket stereo.