Once upon a time my horn button worked so I think my issue is the wire going down the steering column. (it’s the last piece of cloth wire on my truck…everything else is replaced with plastic insulated wire).
Any tips on running a replacement? Should I use #10 AWG so the ground is good? I’m worried my old wire will break as I pull the new wire through.
Use the same size wire up thru the steering column. The only load on the ground wire to the button is the relay coil, which is minimal, and definitely doesn't need #10. You'll need to remove the steering shaft bushing from the column to make the connection to it.
This means your relay is set up correctly.
- There are 2 wires on the horn, one is connected to the hot wire of the voltage regulator and the other is grounded.
If it's connected to hot and ground, it should be blowing constantly. The relay must be between the regulator and the horn.
- I disconnected both wires and tested ground from the horn body (none) and from each of the terminals on the horn (none)
That means the terminals on the horn are isolated from ground, which should be correct.
- I found continuity across the 2 terminals of the horn
Means that the windings in the horn motor are OK.
- wiring diagram shows that I should be getting hot from the Ammeter but I’m getting it off the voltage regulator. Should I change this?
Doesn't really matter where the power is coming from, but as in above, it needs to go thru the relay.
