Disconnect the negative battery cable followed by the positive cable from the battery. Check the battery state of charge by visually inspecting the indicator eye on the top; if it appears black, charge the battery. Perform an open voltage circuit test using a digital voltmeter by touching the black probe to the negative terminal and the red probe to the positive terminal; a fully charged battery should read at least 12.6 volts, depending on the outside air temperature. Remove the battery's surface charge by turning on the high beams for ten seconds, then turning them off and letting the vehicle stand for two minutes. With the engine and all accessories off, measure the voltage again; if it is below 12.6 volts, charge the battery before conducting a load test. For the load test, use a battery load tester to evaluate the battery's ability to operate the starter and accessories under heavy amperage draw. Install the load-testing tool onto the terminals and follow the manufacturer's instructions, maintaining the load for 15 seconds or less while ensuring the voltage does not drop below 9.6 volts. If the battery condition is weak or defective, the tool will indicate this. Cold temperatures may lower the minimum voltage requirements, so adjust accordingly. To replace the battery, disconnect the negative cable followed by the positive cable, remove the hold-down clamp, and lift out the battery carefully. Inspect the battery tray for corrosion; if present, detach the bolts and clean the tray to prevent further corrosion. Ensure the replacement battery matches the original in dimensions, amperage rating, and cold cranking rating, and install it by reversing the removal steps.