[6pack] Wit's end!

[Dr L. Kevin McNelis]

First, I know that it is next to impossible to diagnose electricals 
over the internet...

Situation:  Completely new wiring harnesses-  all of them, main, rear, 
and OD.  New relays, new nearly everything.

All seems to be working well except that when I honk the horn, it will 
not quit!  It is silent until I make the circuit at the sterring wheel, 
then it honks.  I break the circuit, but horn continues to blow, until 
I disconnect the battery.

This is a cheap aftermarket air horn-  could it be shorted out 
internally?  It is one thing in the system that is not new, and I was 
having this problem before the new wiring.  I have checked the horn 
button to relay circuit- it seems to be behaving as designed.

HELP!
Kevin