Load Test

1. Load testing requires use of battery side terminal adapters (AC Delco part number ST-1201, GM part number 12303040 or equivalent) in order to ensure good connections. Do not load test a frozen battery. Replace the battery instead.
2. Use a voltmeter in order to check voltage across terminals. With all loads off, and the green dot showing in the hydrometer, voltage should be 12 volts or higher. If voltage is not 12 volts or higher, replace the battery.
3. With the voltmeter still attached, connect a battery load tester across the battery terminals.

IMPORTANT: Do not complete the following step if the battery has not been recently charged.

4. It the battery has been on charge, apply a 300 ampere load for 15 seconds in order to remove surface charge from the battery. Remove the load.
5. Wait 15 seconds in order to let the battery recover. Apply the specified load located on the battery label or refer to Battery Usage. Read voltage after 15 seconds, then remove the load. Electrical Specifications

IMPORTANT: Estimate the battery temperature by feel and by the temperature the battery has been exposed to for the proceeding few hours.

6. If voltage does not drop below the minimum listed, the battery is good. Return the battery to service.
7. If voltage drops below the minimum listed, replace the battery.