Horn not working

i opened the hood and checked teh relay switch and i use my knife to make the relay touch the metal and the horn sounded off. but i cant get the horn to work on teh steering wheel. so i popped of the cover and the metal insite is rusted. could this be the problem that theres not a good connection? otherwise maybe some wires or bad between teh steering wheel and the relay switch.

1996 hyundai accent 2 dr hatchback

live near tallahassee florida? want to buy a cheap car? im selling mine so i can buy a bike. thanks for reading.