Relay w/Flasher to Honk Horn

yeah the horn constantly goes off!

http://howstuffworks.com/turn-signal2.htm check this out for mor einfo on how flashers work and this will explain the problem why your horn stays on all the time.

you have to complete the circuit in order to make the flasher flash that is what your blinkers do that is why they flash .the horn is not completing the circuit for the flasher to get rid of the current so it will act like it is not even there. and this is why your horn stays constant, the flasher has to see a completed circuit for it to operate correctly or it will just send voltage  through it and not pulse the horn. I have not played with flashers that much so im learning a little more as well about thier operation. Maybe someone can give us some ideas about this .

from what i understand your horn would have to have a positive and a negative for this flasher to work . But i did figure a way out for this to work with two relays and the flasher,but it still will not give you exactly what you want thats the problem.

Instead of trying to use the output of the flasher on the horn's relay negative coil lead from the switch, go to the relay's positive output or directly to the horn's positive lead (at the horn). The horn's negative lead should already be connected to ground. You can use this diagram for adding light flash and instead of connecting to your lights, connect the output of the flasher to the positive lead of your horn.