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III. INSTALLING YOUR AIR TUBING & AIR VALVE
Before cutting any air tubing make sure to double check your measurements. Make sure to cut equal lengths of air line to connect
each horn to the manifold or the horns may sound at dierent times. We recommend cutting lengths with at least an extra inch per
line just to be safe. Unlike compression ttings our push to connect ttings can be used multiple times. The air valve should connect
to the center tting of the banjo tting. When threading any ttings make sure to use Teon tape to prevent air leaks. The air valve may
be mounted in any direction but it preferred that it is mounted vertically.
FITTING FLOW CHART
[Air Source] » [1/2” Line] » [1/2” to 1/2” NPT M Fitting] » [Air Valve] » [5/16” 4-point Banjo Fitting] » [5/16“ Line] » [5/16” to 1/8”
NPT F Elbow Fitting] » [Rear Horn Mount]
1. Plan out the ttings placement out before you begin and make sure you understand the correct order.
2. Make sure that your tank is empty of air and that the compressor is not running during installation.
3. Start by cutting equal lengths of 5/16” tubing to run from each horn to the 4-point banjo tting.
4. If the valve has a directional arrow on its body the arrow starts with the inlet and points out the outlet; the arrow should point
towards your horns.
5. Next connect your air valve’s inlet port to your air source unit using 1/2” air line and 1/2” to 1/2” PTC tting.
IV. WIRING YOUR VALVE & AIR SOURCE UNIT
Your train horn kit will use two completely independent circuits. One circuit will connect your horn trigger (push-button intermittent
switch, or toggled factory button) to your electric valve. The other circuit will connect your accessory trigger (ignition positive wire)
to your air source kit.
VALVE WIRING FLOW CHART
[Factory Horn Wire] » [Toggle Switch] » [Air Valve] » [Ground]
AIR SOURCE WIRING FLOW CHART
[Remote Wire/Accessory Wire] » [Inline Fuse] » [Air Source Unit] » [Ground]
CIRCUIT 1
1. Begin by wiring your horn trigger.
a. If you are intending to use your factory horn switch, start by locating the load wire of the horn button (positive when horn is depressed
in a standard vehicle) and wiring it to the included toggle switch.
b. If you are going to use a push button switch (intermittent toggle switch) wire a fused (5A) wire from any 12 volt source desired
(battery) to your switch.
2. Next wire your switch to any pole of your air valve.
3. Wire the other side of the air valve to ground.
4. Test your circuit by activating your trigger and listening for a ‘click’ from the valve.
CIRCUIT 2
1. Locate an accessory line in your vehicle that is capable of a 16 amp load.
2. Wire your accessory line using an inline fuse (35A) to your air source unit (Red Wire).
3. Ground the other side of your air source unit (Black Wire) to ground.
4. Your air compressor system will not turn on automatically when power is on (Key is in ‘accessory’ or ‘on’ position) and automatically turn
itself o upon reaching destination.
YOU’RE DONE!
It’s time to test your horns! Share your install photos on our facebook at www.facebook.com/hornblasters or instagram/twitter
@hornblasters and don’t forget to check www.trainhornforums.com, the largest train horn community on the internet.
INSTALLING YOUR TRAIN HORN KIT
(cont.)
IMPORTANT:
The air horns and connecting ttings up to the outlet of the air valve will use 5/16” air line. The air source
unit will use 1/2” air line to connect to the inlet port of the air valve.
IMPORTANT:
Do not make any kinks in your air line. Doing so will disrupt air ow and the damage is irreversible.
IMPORTANT:
The air valve is directional and must be properly installed. There is an arrow on the brass body of the valve
that shows the airow direction, the arrow must point towards the horn. Improper installation will cause the
valve to malfunction and create a constant air leak to the horns.
