My 2000 Honda accord has same horn problem. Works when it wants to along with radio volume control on steering wheel. I have replaced cable reel, did not fix problem. Sometimes if you turn a corner it will start working. When you turn off the car and lock doors with key fob horn blows EVERY TIME. Nothing wrong with horn. My SRS light has been on for 10+ years. Gave up on that after dealer reset it 2xs and it came back on again. Obviously they did not know how to fix the SRS lite.

Horn works sometimes when you start driving and then stops after a few miles. Any thoughts. Could airbag be bad. No button for horn you just push on center of airbag to blow the horn.

Thanks

Bill