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Lead Acid battery (Flooded) Charging.

Lead Acid batteries loose their charge over time and require a recharge periodically.  Golf Cart Chargers come in several styles depending on the age of the cart, brand and battery bank voltage.

Battery Connection drawings and Trickle Charging

Common styles:

• Mechanical - Older carts the charger has a mechanical timer used to run a charge cycle.  This style will run one charge cycle and then turn off.  This style of charger will not maintain the voltage in the battery pack.
• Solid State - Newer carts have a solid state charger that when it is plugged into the golf cart first monitors the voltage.  If the voltage is to low the charger will not start a charge cycle.  This style of charger will not start a charge cycle unless the voltage in the battery pack is above it’s set threshold voltage.  This is a safety feature to protect you and the batteries from harm.  Reasoning is if there is a shorted or failed battery in the battery pack applying voltage to it could cause it to explode.  So for this reason if the battery voltage is low your charger will not start a charge cycle.

The style will run one charge cycle and then turn off.  This style of charge will not maintain the voltage in the battery pack.

As long as you are certain all the batteries in the pack are ok and not shorted then you can revive them with a typical automotive 12 volt charger.  Your golf cart charger will start charging once you have a sufficient charge above the chargers threshold voltage.

• Solid State with Maintainer circuit - Many of the Late model to present day chargers have a maintainer circuit.  Once a full charge has been performed the charger goes into Maintain mode to hold the charge over time.  If a battery is shorted the charger will not start a charge cycle.