Possible reasons:
* Poor connection in battery terminals: Check whether the battery terminals are securely attached and there is no corrosion.
* Discharged battery: Measure the battery voltage. It should be approximately 12.6V when the engine is off.
* Faulty alternator: The alternator is responsible for charging the battery. Check if the generator is producing enough voltage.
* Damaged fuse: Check electrical related fuses and replace any blown ones.
*Wiring problems: Check for damage or loose connections in the electrical wiring.
* Faulty ignition switch: The ignition switch supplies power to the vehicle’s electrical systems. Check its operation.
* Defective starter: The starter can cause a loss of voltage in the electrical system. Check its operation.
* Damaged Electronic Control Unit (ECU): The ECU controls the various electrical systems of the vehicle. Check its operation.
Solution:
* Check the battery: Connect the charger or try starting the car using the cigarette lighter leads.
* Test the generator: Do an LED light test or use a multimeter to measure the output voltage.
* Check the fuses: Inspect the fuses and replace any blown ones.
* Check wiring: Inspect wiring for damage or loose connections.
*Check the ignition switch: Turn the key to the “On” position. and check if the instrument panels light up.
* Check Starter: Check if the engine turns when the key is turned to the Start position.
* Check the ECU: This requires a diagnostic scanner and it is advisable to take it to a mechanic.