Geno's seems to suggest the snap nuts may have run through '09. Not that it's any consolation!! But at least maybe not just 2nd Gens are guilty of using these

 

8W-33-3 Shows that connector. But, it only shows three wires going into it... In the connector pinout section though..... It shows five wires, two of which are black/light green, for horn control. Of course, the manual also indicates that connector should be black, and yours most certainly is not.

 

N THAT, is why I'm frustrated, LOL!
...and relieved that everything werx, in spite of the black wire hanging out in the open.

 

Two black wires go to the same pin on the connector. (pin 5) both are for the horn. WHY there is two, I haven't the faintest......

 

Guilty, thats a good way to put it!