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A FRIEND OF MINE GAVE ME THESE HADLEY AIR HORNS, SO I'M ANXIOUS TO INSTALL THEM. MY OTHER BUDDY WITH A SILVERADO SS HAS A SIMILAR SETUP BUT HE HAS A TOGGLE SWITCH THAT LETS HIM SWITCH FROM STOCK TO AIR. I WANTED TO RUN THE SAME WAY BUT I'M NOT SURE HOW TO WIRE IT. ANY SUGGESTIONS IDEAS OR PREFERABLY A PICTURED DIAGRAM WOULD BE GREAT. HERE IS A LINK TO THE HORNS: http://www.hadley-products.com/catalog/Catalog.aspx?cmd=prd&div=3&cat=52&prd=23
 

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You need an SPDT (single pole double throw) switch. Run the horn wire from the cab to the center terminal and hook one set of horns to each side of the switch. The air horns will probably draw more power than stock so you'll need a relay. Hook the switch to the relay coil and connect the relay contact between the horns and the battery.
 
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