The air valve was then wired, using the frame as a suitable ground and running the hot wire up to the switch in the cab. Each wire and each air line was wrapped in split-wire loom and routed inside the framerails to keep them as safe as possible. As you can see, the horns were ready to blast and with them front bell-mounted in a straight line, they should sound very even and they looked good too.
HornBlasters Train Horn Kit Installation - Attention Getter