New horn, perhaps?

[Judhudson]

Well, we've been troubleshooting for a long time, and I think we finally found out my horn problem.  I just want to check with you guys to see what needs to be fixed.  My horn stopped honking (it did continually honk, but fooled around with it and got it to stop).  Changed relay, looked at all of the wires and connections.  Everything seems to be good on the inside.  So I went to the engine bay.  Thought if I unhooked one horn, perhaps it would work.

Well, it did.  I unhooked a horn and it the horn that was still hooked worked.  Measured the voltage, 11.4 volts.  Well, I unhooked the working horn and hooked the other horn up (it has a high pitch, passenger side I believe).  To my surprise, it works!  And when I measure it, it was 11.4 volts.  This is what gets me - when I hook both of them back up, the horn no longer honks when you press the button.  I measured the voltage, and it is 6 volts.  Something ain't right.  Does this happen when one horn goes bad?

[Plumcrazy]

Sounds like you might have resistance somewhere in the part if the circuit that feeds the horns.   When you hook up both horns you are trying to draw twice as much current through it.   Thats why your voltage is dropping more with both horns compared to one horn.