'68 C20 - Troubleshooting Horn - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Xavier · 03-26-2020, 05:38 PM

When I picked this truck up it had a POS steering wheel that didn't even have a horn button, not to mention it was missing the horn as well.

Well, now with a lot of free time on my hands I figured I'd look into getting that fixed so I ordered some horns online expecting to be able to pop 'em in but I'm having trouble getting anything from the horn relay.

Since I have owned it I have replaced that junk steering wheel with an actual 67-68 steering wheel. It looks like I'm not getting continuity from my number 10 to 12 unless I shove the plunger way further down then the horn button would. It also looks like I have the contact kit marked 9 (which is labeled 69-72) rather than 8 (for 67-68).

Should I be looking for my test lamp to light up when the horn button is pressed on the BLACK wire on the horn relay?

Thanks for any help.

Also the signal switch internals are broken so I figured if I'm digging into the steering wheel / column I may as well replace that too. Any tips for removing it? I remember trying to pull it out before but had no luck.

**dmjlambert** · 03-26-2020, 09:13 PM

I think you're going to need the deeper metal cup illustrated by LockDoc in this thread:
http://67-72chevytrucks.com/vboard/showthread.php?t=765874

Xavier · 03-27-2020, 02:34 PM

Hmm, I definitely have the larger cup and what looks like the correct spring and whatnot. Thanks for the link, it gave me some more insight.

Andy4639 · 03-29-2020, 10:51 PM

Well to begin with the picture in your post is for a tilt column which is different than a standard column as far as how it's assembled. The horn is grounded through the steering column so if you take the wheel off try and short the copper ring on part #12 to the steering shaft and see if the horn works. If it does then put it back together one part at a time til you find which part isn't working.

Xavier · 04-06-2020, 08:57 AM

Ended up getting it working yesterday. Pulled the steering wheel off again and shorted the horn contact to the steering column and heard the relay click. I then reassembled the steering wheel and horn components and kept testing for the relay click as I put it back together. Turns out I had to leave the three screws in the plastic spacer ring a little loose for it work properly. I had previously been snugging everything up.

03-26-2020, 09:13 PM	#2
dmjlambert Senior Member Join Date: Apr 2016 Location: Cypress, TX Posts: 3,563	Re: '68 C20 - Troubleshooting Horn I think you're going to need the deeper metal cup illustrated by LockDoc in this thread: http://67-72chevytrucks.com/vboard/showthread.php?t=765874 Last edited by dmjlambert; 03-26-2020 at 09:15 PM. Reason: Corrected the link

03-27-2020, 02:34 PM	#3
Xavier Registered User Join Date: Aug 2018 Location: Coatesville, PA Posts: 52	Re: '68 C20 - Troubleshooting Horn Hmm, I definitely have the larger cup and what looks like the correct spring and whatnot. Thanks for the link, it gave me some more insight.

03-29-2020, 10:51 PM	#4
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,936	Re: '68 C20 - Troubleshooting Horn Well to begin with the picture in your post is for a tilt column which is different than a standard column as far as how it's assembled. The horn is grounded through the steering column so if you take the wheel off try and short the copper ring on part #12 to the steering shaft and see if the horn works. If it does then put it back together one part at a time til you find which part isn't working. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

04-06-2020, 08:57 AM	#5
Xavier Registered User Join Date: Aug 2018 Location: Coatesville, PA Posts: 52	Re: '68 C20 - Troubleshooting Horn Ended up getting it working yesterday. Pulled the steering wheel off again and shorted the horn contact to the steering column and heard the relay click. I then reassembled the steering wheel and horn components and kept testing for the relay click as I put it back together. Turns out I had to leave the three screws in the plastic spacer ring a little loose for it work properly. I had previously been snugging everything up.

03-26-2020, 05:38 PM	#1
Xavier Registered User Join Date: Aug 2018 Location: Coatesville, PA Posts: 52	'68 C20 - Troubleshooting Horn When I picked this truck up it had a POS steering wheel that didn't even have a horn button, not to mention it was missing the horn as well. Well, now with a lot of free time on my hands I figured I'd look into getting that fixed so I ordered some horns online expecting to be able to pop 'em in but I'm having trouble getting anything from the horn relay. Since I have owned it I have replaced that junk steering wheel with an actual 67-68 steering wheel. It looks like I'm not getting continuity from my number 10 to 12 unless I shove the plunger way further down then the horn button would. It also looks like I have the contact kit marked 9 (which is labeled 69-72) rather than 8 (for 67-68). Should I be looking for my test lamp to light up when the horn button is pressed on the BLACK wire on the horn relay? Thanks for any help. Also the signal switch internals are broken so I figured if I'm digging into the steering wheel / column I may as well replace that too. Any tips for removing it? I remember trying to pull it out before but had no luck.



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