Odd electrical challange

[Blue GMC]

Noticed something odd with the horn about a year ago on my 71 GMC and never thought of it again. Well a few weeks ago I brought her out of winter slumber and saw my post it note on the bench and started checking. No horn and no hazards either odd. Checked and the turn signals work. Wondering it this is just most likely the horn and hazard relays craping out at the same time? Did check and no power to horns. this is a 4 speed column that has never been messed with. Just looking for an attack strategy to maximize the one day I will get to mess with it over the 4th holiday.