Question about Cars & Trucks
Without knowing the car, the generic answer is to start at the fusebox and see if the fuse is blown. If it's good, check the horn relay. If it clicks and you get 12v coming out of it with the horn installed then, check the horn itself by hitting it with 12v. If the relay does not click (presuming it's not solid state) then you'll have to check the round contactor at the steering column which allows the wheel to turn multiple turns and still pass the signal. While you've got it apart, check the horn switch. If all those components work (including the horn) but the horn still does not sound when you hit the switch, check for a bad grounding wire from the horn.
Posted on Apr 26, 2015
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Posted on Jan 02, 2017
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