User Manual
1. If testing in-vehicle, make sure all vehicle loads (lights, etc.) are
off and the key is removed. Connect the tester clamps to the
battery: red to positive(+), black to negative (–). Rock each
clamp back and forth to make a good connection.
2. The battery rating system last selected will appear on the
display for 3 seconds, then the default rating value. (To change
the rating system, follow the steps in “1. Selecting the Rating
System.”)
3. Use the ARROW buttons to scroll to the battery’s rating.
4. Press the TEST button.
5. One or more top-panel LEDs (green, green and yellow,
yellow, or red) will light to indicate the battery’s condition.
The display will alternate between the voltage and available
power.
If the display flashes or shows one flashing letter, the battery is
too low (< 8 volts) to test. Fully charge the battery and retest.
A message that alternates between bAd and CELL means one
or more battery cells are bad. Replace the battery.
A conn message means there is a bad connection. Disconnect
the clamps and reconnect. Make sure to rock the clamps back
and forth to make a good connection.
If the top-panel red LED lights
when you test in-vehicle, there
may be a poor connection between the battery cables and the
vehicle. Disconnect the battery cables and retest at the battery
posts before replacing the battery.
Excessive electromagnetic interference may cause the tester to
reset during testing. Before retesting, reconnect the clamps and:
• Make sure all vehicle loads and the ignition are off.
• Move away from the noise source, which may be a charger or
other high-current device.
• If you are unable to find the noise source, fully charge the
battery and retest at the battery posts. If the top-panel red
LED lights again, replace the battery.
2. BATTERY TEST
Bottom-Panel LEDs
Decision
5. STARTING SYSTEM TEST RESULTS
TROUBLESHOOTING
NOTE: The battery must be good and fully charged for
this test.
1. When the vehicle is running, connect the tester clamps to the
battery: red to the positive (+) terminal, black to the negative
(–) terminal. Rock each clamp back and forth to make a good
connection.
2. Press the V button to read the live voltage.
3. Rev the engine at 2000 rpm for 15 seconds.
4. Press and hold the UP ARROW to read the highest average
charging voltage.
NOTE: The battery must be good and fully charged for
this test.
1. Connect the tester clamps to the battery: red to the positive
(+) terminal, black to the negative (–) terminal. Rock each
clamp back and forth to make a good connection.
2. Press the V button to read the live voltage.
3. Start the vehicle.
4. Press and hold the DOWN ARROW to read the cranking
voltage.
4. STARTING SYSTEM TEST
Top-Panel LEDs
GREEN
YELLOW
Decision
GREEN
YELLOW
RED
The battery has failed or is weak and
may soon fail. Replace the battery.
Fully charge the battery and return it to
service.
Fully charge the battery and retest. If
you get the same result after charging,
replace the battery.
The battery is good. Return it to service.
3. BATTERY TEST RESULTS
GREEN
The cranking voltage is greater than
9.6 V. The starting system is OK.
The cranking voltage is less than 9.6 V,
which indicates a starting system
problem. Check the connections, wiring,
and starter.
RED
Bottom-Panel LEDs
Decision
GREEN
The highest average charging voltage
is between 13.3 V and 15.5 V. The
charging system is OK.
RED
7. CHARGING SYSTEM TEST RESULTS
The highest average charging voltage is
less than 13.3 V or greater than 15.5 V,
which indicates a charging system
problem. If less than 13.3 V, check the
connections, wiring, and alternator. If
greater than 15.5 V, check the regulator.
6. CHARGING SYSTEM TEST