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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 might cause sparking at the connection to the negative or positive
terminal?
Answer: It is important that the tester clamps make a good connection to the
battery terminal (preferred) or to the battery connection hardware. Avoid connecting
to any screws that are used as part of the vehicle’s battery connection. In some
circumstances, usually when connecting to such screws, an inefficient connection
is made that provides very little surface contact from the clamp to the connected
surface. In such cases, the tester’s electrical pulse will try to follow the easiest path
to the battery posts. If such a situation occurs, disconnect tester immediately and
attempt to make a better connection with greater surface contact between the clamp
and the connected surface.
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