I just disconnected my horn. Has the nice side effect of stopping me from rage beeping at idiots too! I hated having a loud honk in residential areas late at night.
I was thinking I might connect the 12V for the horn to the ACC, so it can only beeps when ignition is on, but I haven't got around to that yet.
You'll want to be sure to check your local laws before doing that. Most (maybe all?) US states require a working horn for safety reasons. Here, for example, is Minnesota: https://www.revisor.mn.gov/statutes/cite/169.68
I live in New Zealand, so no US state or federal laws apply (unless I get extradited?)
Yes, it is a legal requirement, which in practice could void an insurance claim, or a criminal case if I hurt someone, but sometimes you just have to make a choice.
> Every motor vehicle when operated upon a highway
At least if OP follows through on running his car through his key, he'll be safe. (How about using a relay attached to something that's powered during key-on?)
It's a legit use of the horn to make some noise when another driver can't see you and is about to collide with you. (Honest mistake that happens to a lot of people, the horn should be seen as non-judgmental in that case.)
I was thinking I might connect the 12V for the horn to the ACC, so it can only beeps when ignition is on, but I haven't got around to that yet.