Possible reasons:
* Dead battery: Check the battery terminals for corrosion or loose connections.
*Blown main fuse: Locate the main fuse and check if it is blown.
*Faulty Ignition Switch Relay: This relay supplies power to the ignition system, headlights, and other electrical components.
* Damaged ignition switch: The ignition switch transfers power from the battery to the starter and other electrical components.
* Damaged or loose wiring harness: Check the wiring harness for damage or loose connections.
* Faulty alternator: The alternator produces electricity for the vehicle’s system.
* Engine control unit (ECU) failure: The ECU controls various electrical functions of the vehicle.
*Short Circuit: Electrical current may pass through an unintended path, resulting in loss of electricity.
What to do:
* Check the battery: Connect a voltmeter to the battery terminals, and then start the engine. The voltage should be between 13.5-14.5 V.
* Check the main fuse: Locate the main fuse and make sure it is intact. Replace the fuse if it is blown.
* Check the ignition relay: Remove the relay and connect a tester to it. When voltage is applied to the relay coil, the contacts should open.
* Check the ignition switch: Use a multimeter to check the continuity of the ignition switch.
* Check Wiring Harness: Inspect the wiring harness for damage or loose connections.
* Check the generator: Use a voltmeter to check the voltage at the generator terminals. The voltage should be between 13.5-14.5 V.
*Check the ECU: Connect a diagnostic scan tool to the vehicle and check for trouble codes indicating a faulty ECU.
*Check for shorts: Use a multimeter to check continuity between components and ground.
Adviсe:
*For safety, please disconnect the battery before starting work.
* Use appropriate tools and protective equipment.
*If you are unsure of any procedure, seek assistance from a qualified mechanic.