Battery Load Test
WARNING: This page is about a different car, the 2003 Mercury Mountaineer, 2003 Ford Explorer, 2002 Mercury Mountaineer, and 2002 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Connect battery tester according to tool manufacturer's instructions. Load test battery at approximately one-half cold-cranking amperage rating for 15 seconds while observing battery voltage. If voltage reading is 9.6 volts or more, battery is okay. If voltage reading is less than 9.6 volts, charge battery and retest. If loaded battery voltage is still less than 9.6 volts after charging battery, replace battery.