The Differences Between Heavy Duty Train Horn Wiring and Standard Horn Wiring
First in a heavy duty setup the train horn will a pressure switch that will go specifically near the exhaust of the air compressor. The switch will have two separate wires that come from it. First there is the positive charged wire that will move directly to the battery or other material that creates the 12-volt energy needed for the horn to work properly. Second there is an individual wire that connects to a relay terminal.
The relay terminal that is used will have four wires coming from it. First there is the red wire on terminal 87 of the relay that moves directly to the air compressor. A blue wire is then used from terminal 86 to the pressure switch.
After this terminal 85 will have a separate wire that is grounded. This is used to control the electrical currents that come from the entire setup. This wire will be brown in color. The last of the wires that are used is the yellow wire from terminal 30 that attaches to the positive wire that moves between the 12-volt energy generator and the pressure switch.
Finally the battery will need to have a positive wire that links to the button used to activate the horn. A positive wire will also go between that button and the solenoid.
Everything else for the wiring of the train horn kits is going to be the same. The solenoid will still use a ground wire along with an air hose to connect with the air tank. An air hose is also used between the air compressor and air tank.
Train horns for trucks
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