Horn issues

[Senorx]

1971 K5 with non tilt column.

I haven't been able to get my horn to function at the steering wheel. I removed the steering wheel cap and removed the pink plastic ring, the silver dog dish, the domed metal ring and discovered my steering was missing the horn contact plunger/Spring/plastic barrel. I ordered parts and new relay just in case. Not able to get horn to function by shoving a screw driver into the canceling cam and touching the brass on the bottom.

So far I've done the following:

1) Horn was hard wired to the battery and it functions.
2) Replaced horn relay with a new one.
3) Unplugged harness at the relay. I jumped red wire to green wire and horn functioned.

Where do I go from here? I'm stuck and frustrated. Should I remove the steering wheel and see if the brass tab is actually connected to the black ground wire?

[Wootdog]

I would
Kerry

[LockDoc]

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What does it do if you short the spring loaded plunger to the steering shaft nut?

LockDoc

[Senorx]

I just touched a wire to the brass tab at the bottom of the canceling cam to the steering wheel nut. Nothing happen.

I know the spring goes first, then the plunger with the plastic barrel head first. How far is the plunger suppose to stick out?

[Ol Blue K20]

If you touch the plunger to steering shaft and nothing happens check the rag joint. There should be a strap that carries the ground from one side of the rubber to the other side.

[Senorx]

Got the steering wheel removed.

Canceling cam is there.



Removed canceling cam to find this.



Where is the brass tab in the cancelling cam suppose to ground? I'm more
Confused.

[ray_mcavoy]

Originally Posted by Senorx

Where is the brass tab in the cancelling cam suppose to ground? I'm more Confused.

If I remember correctly, there is supposed to be a spring-loaded contact button in the turn signal switch assembly that makes contact with that brass ring on the underside of the canceling cam. Should be in that empty hole that's just to the upper/right of the steering shaft in your 2nd pic.

This is for 73-up but it's pretty similar with the exception of the lock plate --> http://67-72chevytrucks.com/vboard/s...d.php?t=434468

[Senorx]

SCORE! Ray and Ol Blue you are absolutely right! I just short wired the inside of that hole to the steering shaft and HORN went off. I guess I need to order that part. LMC doesn't show it in their catalog. Any ideas where to get this part?

[LockDoc]

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If you haven't already, read through this thread...

http://67-72chevytrucks.com/vboard/s...d.php?t=426902

You almost have to read the whole thread because there is some wrong info in places...

LockDoc

[Ol Blue K20]

You are missing the contact in the turn signal switch. The easiest fix is a new switch....

[Ol Blue K20]

Like I mentioned, it's easiest to get new switch. You can always try and steal one out of a switch at the wrecking yard. I'm not sure how the contact is secured in the switch though...keep us informed. ..

[Senorx]

Might as well go with the new turn signal switch. Any site vendors I should use?

[Ol Blue K20]

The last one I bought I got it at Napa auto parts. That way no shipping no wait...

[Senorx]

Did it have the correct hazard button?

[Ol Blue K20]

It did not Have the the straight red one. I'm not sure if those are reported or not and if they are what the quality is. The one thing I forgot to mention is read through the thread Loc Doc has linked for the horn button it has good info. I have seen more than one thread on that.

[Grumpy old man]

It's easier to use my method ... Bumper sticker that reads ...Horn broke watch for finger !

[Senorx]

Anybody know if the brass contact I'm missing in my turn signal switch is spring loaded or how it's attached. I can see the ground wire way in the back of the empty hole on mine.

[Senorx]

Decided to order from site vendor. GMCPaul took my order and then 48 hours later send me a "back order" email and order cancellation. Not a good first experience with a site vendor.

[Ol Blue K20]

Don't get discouraged, I haven't purchased anything from him yet but I have heard a lot of good things about them. A lot of places would have made you wait for the back order. At least he cancelled the order so you could look elsewhere.

[Senorx]

Anybody know what is actually behind the brass button for the horn ground on the turn signal switch? Is it Spring loaded? Is it a part that can be rebuilt from another turn signal switch if I go to a junk yard? I'd hate to pay 50.00 for one, if I can just add the button from a used one.

[Ol Blue K20]

It is spring loaded. I have never tried to take one out. I would go to a wrecking yard and try though. ..

[Senorx]

I never updated my fix, so here it is. I found a brass button, Spring and retainer plate for my cancelling cam on this board. I paid 5.00 bucks for it and just rebuilt mine. I put it all back together and my horn is officially operational. My K5 passed inspection with flying colors!

I couldn't have done it without you guys. I'm actually proud that I did it the right way and was able to figure it out finally. I'm learning as I go along and having a blast along the way so far. This turned out to be an epic horn thread and should be a stickie for HORN 101. I hope others will someday do a search and this thread will help them out.

With my brass ground button installed.

[Grumpy old man]

Clean all that Texas turf out of there with some electronic spray cleaner before you reassemble all of it .