Possible electrical reasons why the car will not start:
1. Discharged or faulty battery:
* When trying to start the car, only clicking or dull sounds are heard
*Car lights are dim or won’t turn on
* The voltage at the battery terminals is below 12 V
2. Faulty starter:
*Starter does not rotate or rotates slowly
* You hear clicking or grinding sounds when you try to start the car
* Starter wires or connections are damaged
3. Faulty starter relay:
* The relay does not close the contacts to connect the starter to the battery
* The relay makes a clicking sound, but the starter does not turn on.
4. Problems with the ignition system:
* Ignition coil is faulty or not receiving power
* Spark plugs are faulty or dirty
* Ignition distributor or ignition control module is faulty
5. Main fuse malfunction:
* The main fuse protects all electrical systems of the vehicle
* A blown main fuse will cut off power to the machine.
6. Fuel injector malfunction:
* Fuel injector is faulty or not receiving power
* Fuel filter is clogged
7. ECU (engine control module) malfunction:
* The ECU controls all electrical functions of the vehicle
*A faulty ECU can cause problems with the ignition, fuel injection or other electrical systems
Diagnosis and troubleshooting:
*Check battery voltage
* Check starter operation
* Inspect the starter wires and connections
*Check the spark plugs and ignition coil
*Check main fuse
*If no problem is found, contact a qualified mechanic for further diagnosis and repair.