Charging Procedure

NOTE: ALWAYS turn off the ignition when connecting or disconnecting battery cables, battery chargers or jumper cables. Failure to do so may damage the PCM or other electronic components.

Battery Temperature Vs. Voltage Drop:

When charging battery in vehicle, proceed to Step I. If charging side terminal batteries out of vehicle, install adapter kit (AC Delco part number ST- 1201, GM part number 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. 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. After charging, battery should be tested as outlined in "Diagnosis".