How To Connect Horn To Brakes. The car honked at a couple random people and they gave me some glares man. Fellow motorists and pedestrians would have been left wondering what all the honking was about after a driver had a loud horn wired to the brakes of his vehicle.
This would result in the need for a relay to change the 12V brake to ground when you depress it. It worked when he unlocked his truck and hit the brake to put it in gear but then stopped. Answer 1 of 2.
PLUS video.
The easier thing to do would be to do it from the turn signal to the brake wink. Not to hard at all. Run a wire to a button you have mounted in the dash. Brake System Check The white wire should be connected to the light tester when testing the brakes.
