HornBlasters AirHorn 200-Series - Manual (Page 5)

Safety Valve in Tank:
1. Install the safety valve into any spare 1/4” NPT port on your air tank. If the safety valve already has sealant on its threads, it is
unnecessary to use Teflon tape on the threads. Do not mount on bottom of tank, and do not use as drain.
4
Valve Wiring Flow Chart (Circuit 1)
[Factory Horn Wire] » [Toggle Switch) » [Air Valve] » [Ground]
V. 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
switch, or toggled factory button) to your electric solenoid valve. The other circuit will connect your accessory trigger (ignition
wire, accessory wire) to your air source kit. If you have trouble with wiring, you can find a wiring diagram of your vehicle on
www.the12volt.com. This can help you locate certain wires to properly and safely install your train horn kit!
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 button is depressed in a standard vehicle) and wiring it to the included toggle switch (any side).
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 (any side).
2. Wire your switch to any lead 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 quiet “click” sound from the valve.
Circuit 2
1. Find the accessory line in your vehicle (this is a wire that is only powered when the key is turned to the ‘accessory’ or ‘on’
positions.
2. Using the supplied 18 gauge wire connect the accessory wire to the “BLUE ignition positive wire” from the pressure switch.
3. Ground your pressure switch using the small “BLACK wire” from the pressure switch.
4. Locate your 12v DC power source that is capable of handling a 26 amp load.
5. Run the supplied 10 gauge or bigger wire to the inline fuse holder using the supplied 35 amp fuse. Then connect this to the
“RED fused 12v positive wire” from the pressure switch.
6. Connect the pressure switch to the air compressor using the “WHITE compressor wire” from the pressure switch to the “RED
wire” from the compressor.
7. Ground the other side of your air compressor using the “BLACK wire”.
8. Your compressor system will now turn on automatically when power is on (key is in ‘Accessory’ or ‘On’ position) and
automatically turn itself off upon reaching pressure limits.
You’re Done!
It’s time to test your horns! Share your install photos on our Facebook fanpage at www.facebook.com/hornblasters and don’t
forget to check out www.trainhornforums.com, the largest train horn community on the internet!
Air Gauge in Tank:
1. Install the Hornblasters Air Gauge in the last remaining 1/4” NPT port using Teflon tape or paste on the threads. Make sure to
mount the air pressure gauge on the side or the top of the tank so that condensation will not be able to drain in to the
gauge.