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from the battery, and return the control knob to off (3) Allow the battery to stabilize for 2 minutes, and then verify open circuit voltage. (4) Rotate the load control knob on the tester to maintain 50% of the battery cold crank rating for 15 (5) Voltage drop will vary according to battery temperature at the time of the load test. Battery (6) If battery passes load test, it is in good condi- tion and further tests are not necessary. If it fails BATTERY OPEN CIRCUIT VOLTAGE TEST An open circuit voltage no load test shows the state of charge of a battery and whether it is ready (1) Remove both battery cables, negative cable first. Battery top, cables and posts should be clean. If (2) Connect a Volt/Ammeter/Load tester to the bat- tery posts (Fig. 4). Rotate the load control knob of the Fig. 4 Volt-Ammeter Load Tester Connections 1 – NEGATIVE CLAMP Fig. 5 Remove Surface Charge From Battery Fig. 6 Load 50% Cold Crank Rating Load Test Temperature Minimum Voltage Temperature °F °C 9.6 volts 70° and above 21° and above 9.5 volts 60° 16° 9.4 volts 50° 10° 9.3 volts 40° 4° 9.1 volts 30° -1° 8.9 volts 20° -7° 8.7 volts 10° -12° 8.5 volts 0° -18° 8A - 6 BATTERY WJ DIAGNOSIS AND TESTING (Continued) 2000 JEEP GRAND CHEROKEE |