Horn problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lutronjim · 10-23-2021, 11:36 AM

Horn quit blowing. Grounding horn button pin on relay sounds horn - so must be in column. I took contact parts out of the wheel and there was some rust which I cleaned - still wont work. I checked spring loaded button with a dvom to the connector and got 67 ohms - I would have thought it should have been below maybe 5 or less. Is 67 enought to trigger relay?

I then thought maybe I assembled contact wrong - read many post. I put spring disk on wheel raized center up, then the cup, then plastic retainer through the holes and then screwed down. Spring disk appeared centered.

Got to looking at the assembly and I dont understand how it works. The spring disk get a ground from contact with medal hub in wheel. The spring loaded button connects the relay to the spring disk - looks like it would blow all the time.

What am I missing?

Thanks

**Getter-Done** · 10-23-2021, 11:54 AM

Here is a Thread I remember.
Hope this helps.
Link: https://67-72chevytrucks.com/vboard/...=horn+problems

**cwcarpenter98** · 10-25-2021, 11:34 AM

The horn on my 63 wouldn't work because the wire from the plug at the firewall to the plug at the horn had melted completely and was broken in several places. I replaced that section of the wire and have had a working horn ever since

lutronjim · 10-25-2021, 09:09 PM

Got time today to look at situation in the daylight. Found that the spring disk actually fits in a recess in the 'plastic' portion of the sterring wheel so is insulated from the metal hub.
Also remeasured resistance from spring loaded button to plug and found about 13 ohms. Grounding button blew horn OK.

Turns out steering shaft is not suppling ground. Will have to scope it out later.
Thanks for responces

10-23-2021, 11:36 AM	#1
lutronjim Registered User Join Date: Dec 2013 Location: Dunwoody,Ga Posts: 443	Horn problem Horn quit blowing. Grounding horn button pin on relay sounds horn - so must be in column. I took contact parts out of the wheel and there was some rust which I cleaned - still wont work. I checked spring loaded button with a dvom to the connector and got 67 ohms - I would have thought it should have been below maybe 5 or less. Is 67 enought to trigger relay? I then thought maybe I assembled contact wrong - read many post. I put spring disk on wheel raized center up, then the cup, then plastic retainer through the holes and then screwed down. Spring disk appeared centered. Got to looking at the assembly and I dont understand how it works. The spring disk get a ground from contact with medal hub in wheel. The spring loaded button connects the relay to the spring disk - looks like it would blow all the time. What am I missing? Thanks

10-23-2021, 11:54 AM	#2
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 7,724	Re: Horn problem Here is a Thread I remember. Hope this helps. Link: https://67-72chevytrucks.com/vboard/...=horn+problems __________________ ________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build

10-25-2021, 11:34 AM	#3
cwcarpenter98 Senior Member Join Date: Jan 2018 Location: Hickory Flat, GA Posts: 4,421	Re: Horn problem The horn on my 63 wouldn't work because the wire from the plug at the firewall to the plug at the horn had melted completely and was broken in several places. I replaced that section of the wire and have had a working horn ever since __________________ Christian Carpenter 1963 C10 - Frankentruck 283, 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson

10-25-2021, 09:09 PM	#4
lutronjim Registered User Join Date: Dec 2013 Location: Dunwoody,Ga Posts: 443	Re: Horn problem Got time today to look at situation in the daylight. Found that the spring disk actually fits in a recess in the 'plastic' portion of the sterring wheel so is insulated from the metal hub. Also remeasured resistance from spring loaded button to plug and found about 13 ohms. Grounding button blew horn OK. Turns out steering shaft is not suppling ground. Will have to scope it out later. Thanks for responces



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