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Battery Load Test

  1. Check the battery for obvious damage, such as a cracked or broken case or cover, which could permit the loss of electrolyte. If obvious damage is noted, replace the battery.
  2. Check the hydrometer. If the green dot is visible, go to the LOAD TEST PROCEDURE . If the indicator is dark but green is not visible, charge the battery. Refer to Charging A Completely Discharged Battery (Off the Vehicle) .
    WARNING: Do not charge the battery if the hydrometer is clear or light yellow. Instead, replace the battery. If the battery feels hot, or if violent gassing or spewing of electrolyte through the vent hole occurs, discontinue charging or reduce the charging rate to avoid personal injury.
  3. Connect a voltmeter and a battery load tester across the battery terminals.
  4. Apply a 300 A load for 15 seconds to remove any surface charge from the battery.
  5. Remove the load.
  6. Wait 15 seconds to let the battery recover, and apply a 270 A load.
    CAUTION: The battery temperature must be estimated by touch and by the temperature condition the battery has been exposed for the preceding few hours.
  7. If the voltage does not drop below the minimum listed, the battery is good and should be reinstalled. If the voltage is less than the minimum listed, replace the battery. Refer to Battery Specifications .
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