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The car does not have to be running for the horn to work. Horn button in steering wheelt can be making contact, the wire that goes thru the steering wheel and down the column is making contact, any point in the negative side of the horn can cause it to honk. Question. Does it by itself, when car is bumped or rocked, when steering wheel is turned? I would look at steering wheel first. take you horn part of the steering wheel a part and make sure that the plastic in there is not broken or the wires are not of the contections

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17y ago

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