Yup.. that’s it, about 5/16” in diameter when the grease is removed. To run the wire I removed the steering wheel and un-clamped the column both at the bottom and below the dash. Then I slipped the column up the shaft until it hit the inside of the cab roof. After removing the old top bearing and cleaning the grease out of the bottom of the column I dropped a length of fishing line with a small weight down between the shaft and the column. Then I fished the line out through the correct hole and then pulled the wire through. If you need photos of the horn assembly I can pass along the ones that one of the guys here sent to me


1941 Chevy Master 3/4-Ton
In the Gallery
More images in the Bolt Bucket

Born to fish, the truck is only a hobby.