by Hadley
Is air coming out of horn?
If yes, look down projector(s) to ensure there is no obstruction/restriction (examples: spider nest, leaf, moth, mud dauber nest, beehive, etc.). If you find any type of obstruction/restriction remove and try horns again.
If no obstruction/restriction found remove back cover and perform cleaning procedure to remove debris from diaphragm seats.
If air is not coming out of the horn, check to see if there is the air pressure in the tank:
If yes:
▪ Verify there are no kinks in the nylon air tubing.
▪ Check that the solenoid has power (minimum of 10vdc) when the horn button is pushed.
▪ If power is available and you do not hear a clicking sound from the solenoid, the plunger is most likely stuck in the closed position and will need to be cleaned (550 Series only).
▪ First, empty the air from the tank (Do Not attempt to remove solenoid with air pressure in the tank as this could result in personal injury) and then remove solenoid in order to perform solenoid cleaning procedure.
▪ Solenoids can easily be checked by putting a small balloon or baggie over the outlet and looking to see if it fills up with air if it does clean solenoid per the instructions included with your kit when purchased. If you do not have them please refer to the installation instructions for your kit on this site.
▪ Check for debris in Check Valve/solenoid, also check for proper orientation of the check valve.