I've got a '98 Accord with a really weird problem. The horn is intermittent while driving (it doesn't work when the steering wheel is centered, only when turning). When the engine is shut down, and the key removed, it works perfectly, no longer intermittent. When removing the key, it's after the very last "click" that the horn starts working correctly. First, I tried replacing the cable reel assembly, which didn't make any difference.
Now I'm trying to troubleshoot the circuit, but my dumb Haynes manual doesn't have anything in the schematics for the horn. Does anyone know what the source is of the signal for the horn? There's one wire coming out of the airbag assembly (where the horn switch is), and it has a ground when the switch is pressed. Which ends up actuating the relay, etc. But where does that ground come from? I think that's where my solution lies. I thought the ground might come from the SRS wires, but nothing changed after disconnecting them. Same with the ignition switch.
I just can't understand why the ignition switch would have anything to do with this problem, since the horn should always be hot!
Any suggestions or ideas would be welcome! :)