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Train Horn Installation Guide

How to Install a Train Horn Kit

When first installing the train horn kit, first turn the air pump on and only pressurize to 80psi. Next, turn the pump off and have it cool down for 10-15 minutes. Now, after letting it rest, turn the pump back on and fill the tank until it reaches its cut-off pressure of 80-110psi. After the air pump turns off, allow it to cool down again for another 10 minutes. After 10 minutes, you will be able to test the horn. Importantly, the air pump is NOT intended to be used for continuous usage. The air pump will need to cool down between the train horn blasts. If you plan on using the horn every couple of minutes, It is recommended that you upgrade your compressor. Please view our line of air pumps at trainhornkits.net.

Train Horn Operation

The power running from the toggle switch to the air pump should be turned on only after the horn has been used multiple times. The compressor has an automatic shut off pressure switch on it, but there is always the chance that the switch could fail or a leak arises, the compressor will continuously run which will ultimately cause your battery to die or cause the pump to have a drastically lowered useful life due to it continuously running. Ultimately, it is important to follow the guidelines in this tutorial. The steps are:

>Turn the toggle switch on > Allow the pump to pressure until the pressure switch cycles the pump off > Turn the toggle switch off

When using your Train Horn, you will be able to tell when the air pressure is low and you need to turn on the compressor again.

Train Horn Kits Should be used with a Relay

You can find the relay terminal numbers are printed on the bottom of your relay. (It must be unplugged in order to see the numbers) use Teflon paste or tape to install the gauge. Relays, pressure switches, and inline fuses can be purchased separately. 

Below is a visual diagram to help with installation:

Train horn wiring guide


Air Pump

Air Pumps should be installed where the exterior elements (rain, snow, salt, and extreme temperatures) will not affect its performance. Some of the most popular locations for air pumps are either under the seats or behind the seats of your car or truck. The trunk, large tool cabinets, or where the spare tire is kept are good spots but be wary of the temperature of these areas.  Some of our kits have the air pumps connected directly to the compressor, in which case you do not need to worry about installing them separately.  If your kit has them separate, then you can wire them as outlined above.  Below are a few examples of where customers have installed their air pumps:

 Air Pump

Train Horn Air Pump

Train Horn Installation

Our Train horns are very durable and are manufactured to withstand the exterior elements.  They can be installed under the hood or in the undercarriage of your car.  This decision is ultimately up to you.  One thing to keep in mind is that the wires and air lines will need to be protected from the elements to avoid corrosion on the parts.

Train Horn Installed

Train Horn Installed