To determine whether the starter or battery is faulty, the following methods can be used for diagnosis:
1:Listen to the sound and observe the instrument panel: When opening the car's key switch, if no sound is heard or only a faint sound is heard, it may be due to the battery being depleted or damaged. Observing the dashboard's light display for abnormalities can also provide a preliminary diagnosis of battery issues.
2:Check battery status: Open the engine hood and find the battery. Check the battery terminals for corrosion, looseness, or breakage, and perform necessary repairs and tightening. Use a multimeter (such as a multimeter) to check the battery voltage. If the voltage is below 12 volts, it may indicate that the battery is depleted. It is possible to measure the voltage after charging to determine if the battery is in normal condition.
3:Test starter motor: Place the car on a flat surface and turn off the engine. Find the wiring for the starter motor and remove it from the terminal post in the engine compartment. Try starting the car to ensure that the starter motor does not start unexpectedly. Reconnect the wiring of the starter motor to the terminal of the engine, and then attempt to start the car. If it still cannot start, it may be a problem with the starting motor.
4:Measure the starter signal terminal using a test lamp: After confirming that the battery voltage is normal, if the test lamp lights up during startup, it indicates that the starter is abnormal. Remove the starter and further test it.
5:Short circuit the terminals of the starter motor: Use a wire harness to short-circuit the suction coil and the starting coil terminals. If they cannot work properly, it indicates that the starter motor is damaged.
6:Check the battery connection wire: Even if the battery and starter motor are normal, the vehicle still cannot be started. Check if the battery connection wire is loose, and check the ignition switch, starter relay, and neutral start switch of the starter. Then check the vehicle's oil circuit.
You can troubleshoot the problem one by one through the above steps to determine whether it is a starter or battery issue. If you find any problems, you can contact us. We have a professional team to help you solve all problems or seek professional assistance for repairs.