Just discovered my Hi Horn does not work. No amount of tapping/banging works! lol. Wccc is out. none on feebay. Thank you for the help.
If a reproduction is OK for your car, there’s this on feeBay ( from NE Performance Mustang ):
Compared to WCCC, price seems OK for a reproduction vs. OEM.
Funny thing is I just finished detailing an NOS horn I bought ( a Ford Service Part, p/n: B8AZ-13832-B ) and while it is listed as applicable to the 1969 / 70 Cougar, it is obviously a multi-application part; the attached bracket is wrong because the angle for mounting on the radiator support is stamped differently as compared to those found on the assembly line installed horns. Everything else about the horn is correct, though.
Thanks for the info bro. I checked Wccc first then went to feebay. There’s a few Lo pitch factory horns on feebay. The DC part is close but uses screws/nuts vs swaging pin. I do prefer the correct look.
From a mustang site:
Take it from a guy who has worn out a horn in the past!! The standard Mustang horns are pretty simple and absent abuse, corrosion is the usual culprit. Rather than drill out rivets, douse the thing in WD40, let it soak, and then flush it out with brake cleaner. Test it. If it sounds anemic, turn the adjustment screw unitl it sounds like a horn again. Unless your horn has been siting at the bottom of a salt water lake for a couple of decades, you should see improvement.
I tried soaking it in evaporust overnight. Rinsed it with some water, blew it out and still nothing. Not the slightest sound.
The typical failure is the contact points. They build up carbon and no longer conduct. You might try Deoxit 5.
I ordered a can of the Deoxit5. I’ll give it a try. Thank you for the input idea.
I did discover the adjusting screw was turned all the way in. I backed it out and started to get some initial noise. Got the Deoxit today and soaking over night. Find out what happens tomorrow.
I found that when I was cleaning my hi and lo note horns ( with EvapoRust ) I made sure to fill up the cavity with the fluid and then rotate the horn ( like a spiral sea shell ) to ensure that the EvapoRust made it all the way down into the narrowest portion of the horn. If you just pour the solution into the cavity it will not be able to make it past the air pocket which is formed in the inner-most section of the horn. When it came time to pour out the EvapoRust, I just reversed the motion ( a number of times ) to remove the fluid from the inner-most section of the horn. Then I rinsed the interior with distilled water, and finally with isopropyl alcohol ( + a hair drier ) to ensure it was complete dry on the inside.
Hope this helps - best of luck / keep us informed. This is an intriguing ‘experiment’ !
I did just that procedure with the evaporust. That only effects the horn side. When the horn side was full of evaporust, I took that adjusting screw out and no solution came out that hole. It was dry. A metal diaphragm separates the two sides. The contacts are on the other side. I took the adjusting screw out and sprayed the Dioxit in that hole to fill it put the screw back in and turned it upside down so the contacts are covered. I’ll find out how it works tomorrow.
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After removing the deoxit and blowing the horn out. I was only getting the initial bump of the horn. I didn’t try adjusting the screw. So I then put fresh evaporust in the adjusting screw hole and filled it. Let it soak over night. flushed it out with water blew it out then filled the cavity with alcohol to get rid of the water. Blew it out and put crc 2-26 (lubricant). When testing, still just the initial bump noise. So I try adjusting the screw all the way in and it worked! Scared the crap out of me. I adjusted the screw just a little and it is very clean sounding. Thanks for all the input.
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I have had great results using the rebuild kit from Great American Motorworks. The kit is about $25 per horn and it supposedly fits 1963 - 1982 Corvette. It also works fine on 1967 - 1973 Cougar horns. It’s not simple, you need to drill out and reinstall six rivets per horn.