I would say Yes. Not knowing how each of your horns are wired you could find the 12V wire that powers your old original horns. Tap into that and install a relay and power the solenoid air valve that activates the air horns. You may want to install a switch in that line to enable you to shut off the air horns to be able to use you horns in a area you don't need or want air horns. You could use your existing switch for that purpose but you would need to rewire. Just my thoughts. I am not a Tech.
Don & Bev Morgan Weyauwega WI, 05 Itasca Horizon 40KD, 400 HP Cummins, Delorme GPS LT 40, Toad 07 Saturn Vue AWD, Air Force One, TST 510 TPMS, Mayor of Weyauwega 2007 - 2013, Waupaca Co Board Supervisor 2010 - 2014