Charging Procedure

NOTE: Turn OFF the ignition when connecting or disconnecting the battery cables, the battery charger or the jumper cables. Failure to do so may damage the PCM or other electronic components.




When charging a battery in a vehicle, proceed to the first step. If charging side terminal batteries out of the vehicle, install the adapter kit (AC Delco P/N ST-1201, GM P/N 12303040, or equivalent. The adapter should be tightened against the lead terminals of the battery to keep resistance between the adapter and the battery terminals to a minimum.

1. Make sure all charger connections are clean and tight.
2. Charge the battery using the charger setting for 12-volt batteries that gives the highest charge rate to the battery. (Do not use charger settings for jump-starting vehicles to charge the battery. Refer to the charger manufacturer instructions.) The battery should be checked every half-hour while charging. Tap the hydrometer lightly on the top to dislodge any air bubbles that may prevent a correct indication.
3. If the battery feels hot, 52°C (125°F), or if violent gassing or spewing of electrolyte through the vent holes occurs, discontinue charging or reduce charging rate.
4. Perform a battery load test. Refer to Battery Load Test. Battery Load Test