How to repair the ignition system low voltage circuit fault? _Customer Reviews

by:Haiyan     2022-06-30
① Press the horn and turn on the headlights. Use a screwdriver or wire to test fire on the '-' terminal of the ignition coil. If there is no fire, it is an open circuit between the low-voltage terminal of the ignition coil and the ammeter.
Test fire in the order of ignition coil 'switch'→ignition coil 'switch-power' terminal→ignition switch→ammeter, and diagnose the location of the open circuit fault according to whether there is fire or no fire. If the terminal and the wire are not firmly connected or in poor contact, clean the terminal and fasten the fixing nut; if a section of wire is broken, replace the section of wire, and the replaced wire should have the same specifications as the original wire.
② The horn does not sound, and the headlights do not light up. Use a wire to test the fire at the starter terminal. If there is fire, the fault is an open circuit between the starter terminal and the ammeter; if there is no fire, the fault is insufficient battery power or a circuit fault. If the battery power is insufficient, it should be charged; if the circuit is disconnected, it should be reconnected.
③ Use a screwdriver to test fire on the '-' terminal of the ignition coil. If there is fire, test the fire between the movable contact arm of the distributor and the bottom plate. If there is fire, it is a contact fault (such as contact ablation, too dirty, unable to close, etc.), you can use 'platinum sand bar' to grind the contacts and adjust the contact gap to eliminate the fault; if there is no fire, turn to the next step.
④ Test the fire at the insulation terminal of the distributor and the casing of the distributor. If there is no fire, the wire between the insulation terminal of the distributor and the '-' terminal of the ignition coil is open circuit fault; if there is fire, it is The wire between the insulating support and the insulating post is open circuit fault.
If the power is cut off due to poor contact between the terminal and the wire, the terminal and the wire head should be cleaned and fastened; if a section of wire is broken, replace the section of wire with the same specification wire.
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