Possible reasons why the car stalls due to electrical issues:
Battery
*A dead battery may not provide enough power to start the engine.
* Corrosion at the battery terminals limits the flow of current.
* A faulty alternator does not charge the battery properly.
Starter
* A faulty or weak starter cannot turn the engine over.
*A damaged starter relay does not operate when the key is turned.
* Poor connections to starter wires will limit current flow.
Ignition system
* Faulty spark plugs do not create a spark to ignite the fuel.
* A faulty ignition module does not provide enough energy to the spark plugs.
* A faulty crankshaft position sensor does not provide engine position information to the ignition system.
Fuel system
* A faulty fuel pump does not supply fuel to the engine.
* A clogged fuel filter restricts fuel flow.
* A faulty fuel pressure sensor does not indicate sufficient fuel pressure in the engine.
Sensors
* A faulty mass air flow sensor does not provide information about the amount of air entering the engine, which affects the fuel/air mixture.
* A faulty throttle position sensor does not report throttle position, which affects fuel and air flow.
Wiring
* Broken or damaged wires restrict or interrupt the flow of current to critical engine components.
* Poor connections or connectors cause malfunctions and interruptions in operation.
*Corrosion of wires or connectors increases resistance and limits the flow of current.
Other Possible Causes
* A faulty engine control unit (ECU) does not control the engine properly.
*Water or moisture entering electrical components will cause malfunctions.
* A faulty alternator does not provide enough power to operate electronic components and charge the battery.
Diagnostics and repair
To diagnose and repair the problem you will need the following:
* Multimeter
* Trouble code scanner
* Electrical installation tools
* Technical knowledge and experience
Check the following components:
* Battery, terminals and connections
* Starter, starter relay and connections
* Spark plugs, ignition module and crankshaft position sensor
* Fuel pump, fuel filter and fuel pressure sensor
* Mass air flow and throttle position sensors
* Electrical wiring, connections and connectors
* Engine control unit
* Generator