Horn ring ground
I been searching forum and have found conflicting comments. Wanting to wire a relay into the ground side of a SPDT relay. Want the horn to work with horn ring when relay is not active. When relay is active voltage applied it will bypass the factory 2 tone horns.
Can someone tell me the color of the wire in column harness I need to make my connection. I did not want to penetrate the firewall to make the connection if I do not have to. Here is diagram of what I am wanting to do if possible.
SPDT 50a relay with diode will be used.
Thanks
Tim
99 F350 V10 4x4 SRW







