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15. Turn engine OFF and remove the test leads from the battery posts after
completion of testing, always removing the negative clamp first and then the
positive clamp.
Troubleshooting
Question: What does it mean if the Tester Display shows HI?
Answer: The voltage of the tested battery is over 16V and too high of a reading for
a 12V battery. The tester will not work under this situation. Confirm that the tested
battery has a nominal voltage of 12 Volts.
Question: What does it mean if the Tester Display shows LO?
Answer: The voltage of the tested battery is under 4.5V and too low to power
the tester. Confirm that all vehicle accessories are turned OFF and that the tested
battery has a nominal voltage of 12 Volts. If so, charge the battery. If reading is the
same after charging, the battery should be replaced.
Question: What does it mean if the Tester Display is blank?
Answer: The voltage of the tested battery is too low to power the tester. Check
battery connections and be sure that you have not made a reverse connection. If
condition persists, confirm that all vehicle accessories are turned OFF and that the
tested battery has a nominal voltage of 12 Volts. If so, charge the battery. If reading
is the same after charging, the battery should be replaced.
Question: What does it mean if the Tester Display flickers or shows RIPPLE?
Answer: The voltage reading is unstable. Confirm that all vehicle accessories
are turned OFF and that the tested battery has a nominal voltage of 12 Volts. If
condition persists, place a short (15-20 seconds) load on the battery by turning on
the lights or another accessory and then turn accessory OFF. This temporary load
may assist in stabilizing the battery voltage by removing any surface charge on the
battery.
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