Starting and Charging SystemStarting and Charging System Components > Battery 

Function: Supplies the energy needed to start the engine, provides the current to operate the accessories when the vehicle is not running and protects the Powertrain Control Module (PCM) from high-voltage surges.

Signs of Wear: Lack of power when attempting to start the vehicle or when using the accessories.

Vehicle Batteries contain multiple lead cells in a bath of acid. Over time, batteries will deteriorate, and should be checked regularly to ensure that they have sufficient power to start the vehicle. Corrosion around the battery terminals can also cause a vehicle to not start, and corrosion should be cleaned and treated when it is found.

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