66 mustang horn problem
Have a 66 mustang with the standard steering wheel (not deluxe). My problem is that if I only have one of the horns connected and it doesn't matter if its the HI horn or Low horn the horn will honk. When I connect both I get nothing. Car has the original wiring. I first thought contact at the horns were the issue, so I sandpapered both the spade on the horns and then the connector on the wiring. This did not change anything. So right now only one horn is connected so I can have a horn to pass inspection. How do I correct this? I'm sure someone may have encountered this before, however I looked back a ways in this forum and could not find an answer. Thanks in advance for your help!