Horn blowing on its own

If the horn was pulsing then this would be a security issue. However, if it just started sounding continuously then you most likely have a horn switch issue. However, we need to remove the relay and check where we have power. If you connect your meter from 86 and ground you should have 12 volts. Then connect to 86 and 85 and you should only have 12 volts when the switch is pressed to sound the horn. Otherwise it should be an open circuit.

If you have 12 volts then your horn switch is stuck.

Let's run through this and go from there. Thanks

If that is the case, I suspect the switch is stuck. There is a chance this is a shorted wire but with out a meter that is hard to find.

However, wiring issues are more rare then switch issues.

I attached the process on how to do this. If you are going to do it, please make sure you unhook the battery or you will most likely set off the airbag.

Let me know if you have questions. Thanks