Electric horn/Air horn switch

I have a 2012 Jayco Seneca with juice brakes so it came with an electric horn that is less than attn getting so I installed a 150 psi compressor and5ga tank for tires and air horns I have toggle switched the elec/air horns but I wanted too maintain oem look so I purchased an oem switch that utilizes 9 pins which I cant i.d. I have tried access freightliner and freightliner parts but cant find schematic for this switch any ideas