Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#274488 04/01/13 03:22 PM
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james_h Offline OP
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Does anyone know are Klaxon horns are isolated from grounding out on car body? Thank you....JIM

Last edited by james_h; 04/01/13 03:22 PM. Reason: typo
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Yes, the Klaxon 8C is isolated from it's mount. That allows you to use the two terminals as your choice. Remember, one leg of the horn wire is ground that finishes the connection at the horn button. This characteristic is common to all Chevrolet horns.


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james_h Offline OP
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Thanks for the response Ray: What I need to know is what is used to isolate and where is it located? JIM

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Take a look at the terminals on the horn. The bolt is mounted in an insulated hole. Both sides are mounted that way so either bolt can be used for the in/out. Polarity is not a concern.


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1925 Superior K Roadster
1928 Convertible, Sport, Cabriolet
1933 Eagle, Coupe
1941 Master Deluxe 5-Passenger Coupe
1950 Styleline Deluxe 4-Door Sedan
1950 Styleline Deluxe Convertible
2002 Pontiac, Montana, Passenger Van
2014 Impala, 4-Door Sedan, White Diamond, LTZ
2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ

If you need a shoulder to cry on, pull off to the side of the road.
Death is the number 1 killer in the world.


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james_h Offline OP
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Thank You...I will look....JIM

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james_h Offline OP
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Hi Ray: I think the problem is there is a set of "points" (like a distributor) that remain closed. When opening the "points" by hand, the "short" that sounds the horn as soon as it is powered up goes away. Opinion? Thanks.....JIM

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You are talking about the horn adjustment. That is completely a new subject. It has been approached several times here on the Forum. Try some searches and you should locate one of them. Of course the Owner's Manual and Service Manual covers the subject in depth.


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1925 Superior K Roadster
1928 Convertible, Sport, Cabriolet
1933 Eagle, Coupe
1941 Master Deluxe 5-Passenger Coupe
1950 Styleline Deluxe 4-Door Sedan
1950 Styleline Deluxe Convertible
2002 Pontiac, Montana, Passenger Van
2014 Impala, 4-Door Sedan, White Diamond, LTZ
2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ

If you need a shoulder to cry on, pull off to the side of the road.
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james_h Offline OP
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Hi Bill: The Manual sure does help; I have the #26 horn set. The horns work loud. The problem is as soon as the power wire touches the terminal (with no ground wire) the horn sounds. I saw in the manual they use friction tape on the horn mount bracket. This might be the problen, grounding through horn body. Will the manual print via computer? Thank you...JIM

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Hi Jim,

Well...you only have one terminal on your horns if you have the correct ones. You need to ground through the horn bracket. Otherwise they will not work correctly. Did you order the correct wiring harness that I told you about from RI wire? Do you have the replay installed?

What Ray told you is as if you are using a 33 or earlier style of horn.


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Just for my education does the '34 and up use a horn relay? If so the horn button may be wired the same as before (making the ground when button is pushed)? The would activate the relay and let current flow to the horn which is grounded through the bracket?


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The production single orn does not use use a relay.
The dual horn set-up uses a relay.


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I agree with Chevgene....if you look in the parts book 34 is the first year a horn relay is listed. The relay is only used when the dual horns are installed.

If you can't tell this is a subject which I'm very passionate about. At Flint I was 1 of 2 '34's that had the horns installed correctly and I was going to be marked down. They were judging car to car....not to the point’s sheet. Every car in my class that had dual horns should have been marked down but 2, as they were all wrong. Also if your using a Y&Z wiring it is made up for a 33 and how the horns work in 33.


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