Repair Handbook: Troubleshooting Roundup for Electrical System of Electric Tricycle-11

11、The headlight fails to light up

(1) Causes:

① Bulb damaged, ② Headlight switch damaged, ③ Short circuit of wires or connectors.

(2) Troubleshooting: 

① Use a multimeter to test the voltage at both ends of the headlight wire after pressing the headlight switch. If the voltage is normal, the headlight is damaged. If no voltage, the headlight switch is damaged or the wire is disconnected. Connect the two wires of the switch directly and then quickly identify the fault. 

② It may be reverse connection of the positive and negative terminals of the headlight that makes the headlight not light up.

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