Amazon: upper steering column ?

[gjr0]

'67 P220
What locates the upper steering column in jacket tube ?

I replaced the turn signal switch and couldn't get the steering wheel on far enough to start the nut. Looking at it from the engine side, the the bushings had pushed out of the steering shaft coupler ( I have the type where the upper shaft has an 'S' bend at the lower end). It appears that the spring under the turn signal cancelling collar pushed the upper column forward, making it appear too short.

[Ron Kwas]

GJR;

I suggest you locate and check the applicable exploded assembly diagram on the gcp.se site.

Good Hunting!

[gjr0]

That is a lot of detailed drawings but does not seem to show anything except the nut of the steering wheel holding the upper steering column in place. Which brings up the question 'How is the horn switch connected to ground ?' It can't be through the upper column bearings.

[Derek UK]

Horn switch is grounded by a wire that goes down the column and out through the steering box to a ground point. At the flexi joint you are having problems with there is provision for keeping the continuity of this wire. Get this joint back together properly and you will be able to get your steering wheel back on and refit the nut.
Buy a Haynes manual if you don't have one. Second best to the Volvo Green Books (which can be downloaded from online) but a bit more personal.

[gjr0]

I measured 11.75V between the contact that comes out of the steering column and the bolts that hold the steering column sleeve to the dash crossmember. Since there is only one wire, that made me thing that the circuit was completed by closing the horn contacts on the steering wheel, which was grounded (?), leading to my question.

Adding a ground wire to the steering column upper shaft makes the horn work (when I want it to).

[Derek UK]

The wire goes down the column how it does so it doesn't get tangled up when you turn the wheel. Yes you can beep the horn by grounding it how you have done but that is no good in real life. Check the wire that comes out of the bottom of the steering box. DON'T pull it out. It's a job getting the wire up the column again so you need to organise a pull through before you start playing with it!

[gjr0]

I'm not following you.

I have one wire going up the steering column and ~12V at the end of that wire where it contacts the switch. The manual shows power for the horn circuit coming from the fuse, going to the horns and then going to ground at the switch. It does not show any details of the ground connection to the steering wheel.

[gjr0]

Originally Posted by Ron Kwas

GJR;

I suggest you locate and check the applicable exploded assembly diagram on the gcp.se site.

Good Hunting!

I just discovered something about this diagram. If you zoom in far enough a navigation bar appears at the bottom of the page. It eliminates going page by page...

[Ron Kwas]

GJR;

"Horn Switch" at St Whl consists of two contact plates, one is electrically connected to chassis, the other one floats electrically, and has a spring loaded contact to the wire going up the St Column...and these two plates are held apart by a "Switch Separator Foam" ring, which often is deteriorated after such a long time, possibly resulting in decreased sensitivity and even self-sounding. They are available as a replacement part, or an alternate solution is presented at link...

See also: https://www.sw-em.com/122_horn_notes.htm

Good Hunting!