July 2022

Back in April 2016 (my how time flies !!) I had begun preparation for the direction indicator self cancelling function and the steering wheel center horn press.

I fabricate some small pins and fit them to the mount along with holes on the squib ring, this allows me to secure them together.

To secure this mount to the steering column I align it up and drill two holes through the mount and steering wheel boss mount. These holes then tapped on the boss mount. The holes on the squib mount are opened out for the thread clearance and countersunk.

The final step is to solder on ultra flexible silicon sheathed wire for the horn press and trial assembly.

The two spring loaded contact pins on the stalk assembly will keep the squib ring snug on the mount pins.
The squib ring also has lug that cancels the indicator once the wheel has turned and started to return to traight ahead.

When I attempt to fit the horn button I discover that it wants to fall through the hole in the steering wheel, it will lay in position, but if pressed drops down.

After some pondering I decide to make a retaining ring that will sit between the steering wheel and the horn push button assembly.
I take some measurements and knock a design up in Fusion360. I then create some tool paths within the manufacture part of Fusion360.
The file was then output as gcode and sent to my CNC mill I have cobbled together (it once had Anilam automation that had been removed before I got it, I fitted stepper motors etc.) I used superglue to mount a piece of aluminium sheet to a round slug of aluminium, this makes machining it easier.

This turned out to be spot on.

The first picture below does not have the retainer mount holes lined up although they can, the second shows it fully assembled