If anyone has installed a set of Hella electric horns, I was wondering if they used the enclosed relay or just rely on the stock one. Also which wiring diagram did you use?
Thanks in advance
Mark DiGrappa

 

SEE..

https://www.s2ki.com/faqs/faq_horn.php

 

I installed the Hella dual tone air horns last weekend. On my instructions, the correct wiring diagram was Number 1, I believe (out of four). In any case, use the wiring protocol which calls for the "negative switched stock horn line" not the positive switched line.

 

THANKS!! Now I can easily do this job!