nshoemaker wrote: ↑Wed Mar 28, 2018 7:39 am
. I originally thought it was the clockspring so I replaced that and no luck.
Never throw parts without proving the root cause of the problem.
You never actually removed and tested the horn by applying 12v and ground?
Follow the troubleshooting steps in the FSM
http://www.nicoclub.com/FSM/G37/Coupe/2012/HRN.pdf
See page HRN -02
Since you mentioned both horn relays work it is entirely possible you have defective horns. Perhaps they got wet? You never tested them?
Did you ever remove the fiberboard shroud from underneath the vehicle and leave it off?
Telcoman