Causes of Battery Discharging

DESCRIPTION
It is normal to have a small (5 to 20 milliamperes) draw from the battery with the ignition in the OFF position, and ALL lamps OFF. The constant draw is due to various electronic features or accessories that require electrical current with the ignition OFF to function properly. When a vehicle is not used over an extended period (20 days) the main fusible link connector should be disconnected. The main fusible link is located behind the battery on the engine wiring harness. This will prevent battery discharging.


CAUSES OF ABNORMAL BATTERY DISCHARGING
1. Corroded battery posts and terminals.

2. Loose or worn alternator drive belt.

3. Electrical loads that exceed the output of the charging system due to equipment or accessories installed after delivery.

4. Slow driving speeds (heavy traffic conditions) or prolonged idling with high-amperage electrical systems in use.

5. Defective electrical circuit or component causing excess Ignition Off Draw (IOD).

6. Defective charging system.

7. Defective battery.