SOURCE: trying to find out out to hook up a relay switch
Try writing Wolo an e-mail and request a wiring schematic.
http://www.wolo-mfg.com/motorcycle.htm
Good Luck
Steve
SOURCE: I installed a wolo air
It is possible that you may have reversed the polarity on the compressor; it may be "pulling" air instead of blowing it out. Remove the air hose from the compressor and put your thumb over the air outlet while pressing on the horn switch. If you don't feel air blowing out, reverse the positive & negative wires going into the compressor and repeat the test. The air horns should work at this time.
Note: Always install a relay on this type of horn system; the compressor puts a high amount of load on the horn switch if you don't.
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