Repair Handbook: Troubleshooting Roundup for Electrical System of Electric Tricycle-10
10. The horn is out of control.
(1) Causes:
① Horn damaged, ② Horn switch damaged, ③ Short circuit of connection wire or connectors.
(2) Troubleshooting:
① Use a multimeter to test the voltage at both ends of the horn wire after pressing the horn switch. If the voltage is normal, the horn is damaged. If no voltage, the horn switch is damaged or the wire is disconnected. Connect the two wires of the horn switch directly and then quickly identify the fault. ② If the positive and negative terminals of the electronic horn are reversed, the horn will not sound.
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