What Would Cause A Car Battery To Drain. Car batteries can lose their charge for a variety of reasons. Proper car battery maintenance ensures your vehicle is already ready to go.
To help prevent a dead battery you first have to know what causes one. The bad alternator diode can cause the circuit to charge even when the engine is shut off and you end up in the morning with a car that wont. You left your headlights on.
Lets get into the details.
It turns out there are three situations that will cause the stereo to drain the battery. Check the charging system for a loose or worn-out alternator belt problems in the circuit loose disconnected or broken wires or a failing alternator. Faulty diodes open or shorted can affect an alternators power output and hamper its ability to charge the battery and power the cars electrical system. A faulty or bad starter system can drain your cars battery leaving it useless when in need.
