Military federal signal Horn IC/H2S4 US Navy Ship

Description

If you know how to test it let me know please . Bought at estate sale . Don’t know if it works. there is 2posts for 2 wires one must be ground the other power .Not sure what wire to attach to witch post to test .,or if you need a relay or not. There are no broken wires and only one very very minor dent on edge of horn as shown with my finger . Very minor . Some light surface rust . The bolts are missing that hold the cover on easy to get from hardware store . If I can figure out how to test I will .It looks to me that it was never wired if you look at the case knock out spots were the cord is suppose go threw.- federal signal Horn IC/H2S4 US Navy. Condition is "Used". Shipped with FedEx Ground or FedEx Home Delivery.