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Old 22-05-2017
Nutty Nutty is offline
The "One" and only
 
Join Date: Apr 2006
Posts: 12,032
The horn is live all the time. A live feed from the rec/reg runs the power rail to the horn. The live circuit passes through the horn and to the horn button. The N.O. horn button earths that wire, current flows, horn blows.
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