Horn Questions - '82
#1
Burning Brakes
Thread Starter
Horn Questions - '82
The horn on my car doesn't work, and it's been like that since I bought the car. I finally got around to looking at this, and I'm a little confused about the fuse box. The shop manual says the horn relay is powered by the 20A CTSY-CLK fuse. When I checked this, the first thing I saw was that the fuse in my car in that position is 10A. I pulled it out, and it was blown. I replaced it with a 15A, and it didn't blow right away, but neither did the horn. (See what I did there?)
Next, I pulled the horn button off. The only thing I could see wrong was that the contact ring was sloppy when I pushed it on one side. That turned out to be a broken plastic retaining pin. The good news was that I could blow the horns with a screwdriver. I put the horn button back on, and now I could occasionally get the horn to blow briefly if I pushed it just right. Thinking the retaining pin was the problem, I pulled the 15A fuse out and pulled the horn button again. As I was removing the three screws that hold the contact in place, the horn blew. Wait, I already pulled the fuse !!? Checked it again, sure enough, fuse is out, and it's the CTSY-CLK fuse. Knowing the manual instructions are sometimes wrong, I traced it out through the schematic. Yep, the horn relay is supposed to be fed from that fuse.
This leads me to two questions. Does anyone know definitely which fuse powers the horn in the '82? I don't have any history on this car, so it's possible something has been modified. Knowing for sure would be a big help.
Second, I need the three little nylon retaining pins that hold the horn button contact together. Otherwise, it'll cost $30 for a reproduction (probably Chinese) contact. Does anyone know if these might be available from one of the Vette suppliers, or maybe from Dorman? I know there's a warehouse with 250,000 of these somewhere.
Next, I pulled the horn button off. The only thing I could see wrong was that the contact ring was sloppy when I pushed it on one side. That turned out to be a broken plastic retaining pin. The good news was that I could blow the horns with a screwdriver. I put the horn button back on, and now I could occasionally get the horn to blow briefly if I pushed it just right. Thinking the retaining pin was the problem, I pulled the 15A fuse out and pulled the horn button again. As I was removing the three screws that hold the contact in place, the horn blew. Wait, I already pulled the fuse !!? Checked it again, sure enough, fuse is out, and it's the CTSY-CLK fuse. Knowing the manual instructions are sometimes wrong, I traced it out through the schematic. Yep, the horn relay is supposed to be fed from that fuse.
This leads me to two questions. Does anyone know definitely which fuse powers the horn in the '82? I don't have any history on this car, so it's possible something has been modified. Knowing for sure would be a big help.
Second, I need the three little nylon retaining pins that hold the horn button contact together. Otherwise, it'll cost $30 for a reproduction (probably Chinese) contact. Does anyone know if these might be available from one of the Vette suppliers, or maybe from Dorman? I know there's a warehouse with 250,000 of these somewhere.
Last edited by 454Luvr; 02-28-2016 at 07:25 PM.
#2
Le Mans Master
Member Since: Aug 2006
Location: mount holly NC
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C3 of Year Finalist (appearance mods) 2019
Pushing the horn button grounds and activates the horn relay which sends power to the horns.
http://www.vetteprojects.com/bmv/mis...tte%201982.pdf
Instead of rivits you can use nylon screws, nuts and washers.
Size 10 X 24 X 1/2".
http://www.vetteprojects.com/bmv/mis...tte%201982.pdf
Instead of rivits you can use nylon screws, nuts and washers.
Size 10 X 24 X 1/2".
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454Luvr (02-28-2016)
#3
Burning Brakes
Thread Starter
I spent another hour searching for these items, and I think the rivets are Dorman 47901. I also figured out why the horn isn't working - the contact spring is there, but not the pin. So, it's a P.O. issue. Dorman 83230 looks like it replaces this. Hopefully I can find both parts locally. Good idea about the nylon screw and nut. If anyone knows about the fuse, it would still help.
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454Luvr (02-28-2016)
#5
Race Director
If I remember right the horn relay your car is in the same place as the 70-73 which is the driver - left fender just rearward of the alt. The black wire trips the relay and blows the horn. The horn relay is also a junction point for other feeds. You can pull the black wire and use a ground to see if the relay works.
#6
Former Vendor
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St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Follow this guide and you can fix any horn Simple as it gets..
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454Luvr (02-28-2016)
#7
Burning Brakes
Thread Starter
Neither part available locally, so they're coming from Corvette Central. Thanks!
Now that I've replaced the CTSY-CLK fuse, the key warning buzzer is working. At least THAT part of the manual is correct. What's odd is that p. 661 says the horn relay operates from the CTSY-CLK fuse, and a PDF schematic that another member sent me agrees with that. However, that same page of the shop manual has a wiring diagram showing the relay being powered form the Stop/Hazard fuse. I'm pretty sure that's a typo, because the diagram on p. 632 indicates that the Hazard fuse only powers lights and flashers. Guess I'll have to pull the fuses one by one until the horn stops...
OK, one more question... The horn contact kit comes with a spring, eyelet and insulator. Does anyone have an enlarged image of how they fit together? there isn't enough detail in the AIM, and I don't have the original assembly.
Willcox: Thanks for your post, I think I see how the three pieces fit together. Which fuse is that Red wire in your drawing connected to?
Now that I've replaced the CTSY-CLK fuse, the key warning buzzer is working. At least THAT part of the manual is correct. What's odd is that p. 661 says the horn relay operates from the CTSY-CLK fuse, and a PDF schematic that another member sent me agrees with that. However, that same page of the shop manual has a wiring diagram showing the relay being powered form the Stop/Hazard fuse. I'm pretty sure that's a typo, because the diagram on p. 632 indicates that the Hazard fuse only powers lights and flashers. Guess I'll have to pull the fuses one by one until the horn stops...
OK, one more question... The horn contact kit comes with a spring, eyelet and insulator. Does anyone have an enlarged image of how they fit together? there isn't enough detail in the AIM, and I don't have the original assembly.
Willcox: Thanks for your post, I think I see how the three pieces fit together. Which fuse is that Red wire in your drawing connected to?
Last edited by 454Luvr; 02-28-2016 at 10:56 PM.
#8
Le Mans Master
Willcox has the parts also. Here is how the contact goes together in this link...
http://repairs.willcoxcorvette.com/?yt=&s=horn+contact
http://repairs.willcoxcorvette.com/?yt=&s=horn+contact
Last edited by Street Rat; 02-29-2016 at 08:07 AM.
#9
Burning Brakes
Thread Starter
Willcox has the parts also. Here is how the contact goes together in this link...
http://repairs.willcoxcorvette.com/?yt=&s=horn+contact
http://repairs.willcoxcorvette.com/?yt=&s=horn+contact
#11
Burning Brakes
Thread Starter
Here's the relevant part of the schematic. Note the junction dot where the wire from the horn relay is attached. It goes to the output side of both fuses. Not only that, the wires at both fuses (and the wire at the relay) are orange. Doh!
#13
Burning Brakes
Thread Starter
You pulled the clock courtesy fuse but the horn still worked, have you tried to pull the stop hazard fuse and tried the horns?
https://www.corvetteforum.com/forums...anel-help.html
Really a comedy of errors.
#14
Burning Brakes
Thread Starter
You know, I found a post in another thread here that might explain the shop manual error. A member wrote that his '79 feeds the horn from the CTSY fuse, but the factory changed the connection to the STOP-HAZ fuse after that year. I guess they revised the illustrations in the manual for this, but forgot to change the text. That really threw me...
Last edited by 454Luvr; 03-04-2016 at 06:58 PM.
#15
Safety Car
I'm glad you got it! I have an 82 with the tilt and telescopic and the horn hardware usually is a mess by now. Rivets broke, bent or worn contacts... I pulled everything out and replaced everything I could get and luckily it works well. So my advice is if it acts up again, replace everything you can get. It just saves headaches down the road