Horn Wiring Diagram Air Pressure. The relay needs a 12v input 85 to operate the field coil and a ground 86 for the field coil that is controlled by the horn push switch. Look for relay diagrams or a relay schematic that is printed on the side of the.
I didnt use a seperate switchi just used the factory horn wire for my trigger wirei didnt unhook the battery to run my power wirei just loosened the nut on the positive cable and hooked up the wirei pulled the in line fuse first so my power wire wasnt. I have had air horns on my last 4 vehicles and on all 4 i installed another relay for the air hornjust an extra bit of protection. Compressor to be turned off to prevent it from running due to pressure drops in the air tank.
Then they install into vehicle as 1 piece rather than installing each trumpet and dixie video link.
This complete train horn kit uses 12 volt dc components. Using 34 wrench loosen and remove brass outlet fitting that the air line was attached to. Then they install into vehicle as 1 piece rather than installing each trumpet and dixie video link. Not merely will it assist you to achieve your required.