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Re: Horn has power no sound
Where are you measuring the 12 volts? Using my rule of always look at the last place I worked. I would pull the plug off of the horn relay and use a continuity tester within lead on the black lead in the plug and the other lead to a known good ground. You should not have continuity until you push the horn button. Then you you should have close to zero resistance. If this is not what is happening then I suspect that the horn button is not making the connection to ground.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. 
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377
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