Alpine Restyle Kit - Datalink - Horn Button Trolling? Hey everyone - So for once I am actually perplexed at this issue with the Jeep. My wife tells me that she was in traffic and was lowering the volume, accidentally hit what should be the 'input' steering wheel control button, and the horn goes off!!! Needless to say, her first thought was "Why didn't he tell me he did that?! I just beeped at an old man in front of me by mistake!" I'm confused because I had no idea the horn relay went through the ECU. On any other car I've had, the horn is on it's own separate relay - hit the button, relay trips, straight to horn.