How to make a Milwaukee Train Horn This DIY Milwaukee Train Horn Kit for Impact Drill includes a remote control and a trigger button. Just do it with our Drill Train Horn Kit with 4 Trumpets! Premium Trumpets Upgrade Available What's inside? Air horns assembly Air compressor Ready from the box harness with remote signal receiver (not pictured) Remote Control Air hose 2 screws We included all the necessities for building an extremely loud cordless horn from your impact tool. Most Milwaukee drills perfectly fit our compressor and horns to build it yourself. Otherwise, get ready to grind the shell. How to make a train horn? Here are the simple steps: Unscrew a clamp shell Remove gears Remove drill motor Remove harness Fit shell to match air compressor Install new harness Connect air compressor to terminals Connect the battery and doublecheck compressor works properly Screw back shell Drill 2 holes for bolts from the back side Install horns mount using 2 bolts Connect a hose to the compressor and horns Enjoy your new horn!