Hi George, I hope you are there today...this is the day this horn issue finally gets resolved...I hope! With the outside weather in the high 30's here in the Lake Tahoe area I finally my Dad's truck inside my heated garage with all of my tools.
A few days ago I was able to test and jump the wires at the base of the steering column and the horn worked fine. Today I have a borrowed wheel puller (easier than I thought) I have the steering wheel off and column shroud off so I have access and visbility to almost everything. This is what I have found:
1. Brass colored contact (Part #5 on Exploded Drawing you first sent me) is intact and appears in good condition. I did remove it, wipe it down, brushed up the surface with a steel toothbrush to clean any film of the surface. I also disconnected the spade wire connector, cleaned, tighten and replaced. All reassembled.
2. There is a spring loaded brass fitting (looks like the spring of a push-buttoned ballpoint writing pen) that makes the contact with the brass contact ring (Part #5) and must be the problem. After placing the steering wheel back into place and pushing the horn, sti8ll no horn. When I remove the sterring wheel and just jump the brass spring to the splined shaft of the steering wheel (it must be the ground) the horn sounds!!!!
So with nothing seeming to be broken, why/what is the reason that electrical contact to sound the horn is no being made? What's next......????