I’m putting the truck back together after changing the directional harness and getting that whole thing back to working. I put on a new horn relay and tested the connection to the horn by creating a ground to the non horn connected ground tab on the relay. Horn works. I put the steering wheel back on with the spring loaded contact installed and touching the brass ring on the directional harness. By creating a ground, and touching the spring loaded button the horn works. That tells me the connection between the steering column and the horn relay is good, the horn relay is good, and the horn works. So my question is...

Where does the ground come from for the horn? I have a spring disk from LMC and the three screw isolator and a metal cup that the isolator attaches to. The spring disk was not there when I removed the steering wheel but that doesn’t surprise me because the previous owner did lots of crazy things - and it had an aftermarket steering wheel when I bought it.

Does the steering column when the steering wheel is fully attached create the ground? I haven’t put it completely back together yet and tried it.

Tim-o