Possible reasons for electric flashing in a car:
Battery problems
*Weak battery
*Battery terminal corrosion
* Defective battery
Problems with the generator
* Faulty generator
* Bad alternator belt
* Burnt generator diodes
Wiring problems
* Short circuit or broken wires
* Weak grounding
* Corrosion of connectors
Problems with the voltage regulator
* Faulty voltage regulator
* Incorrect voltage readings
Problems with ignition system parts
* Faulty ignition coil
* Damaged spark plug wires
* Faulty spark plugs
Other Possible Causes
* Faulty starter
* Problems with fuses and relays
* Excessive load on the electrical system (for example, installation of additional equipment)
Steps to resolve the issue:
1. Check the battery: Check the battery voltage with a tester. The battery should produce 12.6-12.8 volts at idle. If the voltage is below 12 volts, the battery may be low or faulty.
2. Inspect the battery terminals: Check the battery terminals for corrosion or damage. Clean the terminals and replace them if necessary.
3. Check the generator: Start the engine and check the generator voltage with a voltmeter. The voltage should be approximately 14-15 volts. If the voltage is too high or too low, the generator may be faulty.
4. Check Wiring: Visually inspect the wiring for damage or loose connections. Use a circuit tester to check for a short or open.
5. Check the voltage regulator: Check the generator voltage at different engine speeds. It should remain stable within 14-15 volts. If the voltage fluctuates, the voltage regulator may be faulty.
6. Check the ignition system parts: Check the spark plugs, spark plug wires and ignition coil for damage or malfunction. Replace as needed.
7. Check other components: If other steps do not resolve the problem, check other system components such as the starter, fuses, and relays.
Note: Electrical flashing can be dangerous, so it is best to contact a qualified mechanic if you are not confident in diagnosing and repairing it yourself.