TOOL NEEDED (1) DC test light or probe. TROUBLESHOOTING (1) generally a horn just has two wires positive and negative. Test negative by connecting dc test light negative to the negative on the back of the horn. use positive side of dc test light and touch a known positive connection. dc test light should light if not. find clean know ground for horn. Test positive by connecting neg side of dc test light to a know negative connection. use positive side of the dc test light and touch positive side of horn. test light should light up when you touch the horn switch. if dc test light does not light take a jumper wire and connect one side of jump wire to a known positive connection. take other side of jumper wire and lightly touch positive side of horn connection. horn should beep. if horn does not beep replace horn. if horn does beep test and or replace horn switch.
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