connection is loose or heavily corroded, clean or replace the cable and retest. If the belts
and connections are in good condition, replace the alternator.
“ALT, IDLE VOLTS HIGH”- The voltage output from the alternator to the battery exceeds the
normal limits of a functioning regulator. Check to ensure there is no loose connection and
the ground connection is normal. If there is no connection issue, replace the voltage
regulator. Since most alternators have the regulator built-in, this will require you to replace
the alternator. The normal high limit of a typical automotive regulator is 14.7V +/- 0.05.
Check manufacturer specifications for the correct limit, as it will vary by vehicle type and
manufacturer.
4.3. Charging test with loads turned on
- While the engine is still idling, press the “ENTER” (MENU) button to test the charging
system with the accessory loads turned on. For this purpose, turn on the blower to high
(heat), high beam headlights, and rear defogger. Do not use cyclical loads such as the air
conditioning or the windshield wipers! The screen will show “TURN ON LOADS AND
PRESS ENTER”.
Note: When testing older model diesel engines, the users need to run up the engine to 2500
rpm for about 15 seconds.
- Press the “ENTER” (MENU) button to test the charging system with the accessory loads
turned on. One three possible results will be displayed along with the actual testing
measured:
“ALT. LOAD VOLTS NORMAL” - The system is showing normal output from the alternator. No
problem detected.
“ALT. LOAD VOLTS LOW” - The alternator is not providing sufficient current for the systems,
electrical loads and charging current for the battery. Check the belts to ensure the alternator
is rotating with the engine running. If the belts are slipping or broken, replace the belts and
retest. Check the connections from the alternator to the battery. If the connection is loose or
heavily corroded, clean or replace the cable and retest. If the belts and connections are in
good working condition, replace the alternator.
“ALT. LOAD VOLTS HIGH” - The voltage output from the alternator to the battery exceeds
the normal limits of a functioning regulator. Check to ensure there are no loose connections
and that the ground connection is normal. If There are no connection issues, replace the
voltage regulator. Since most alternators have the regulator built-in, this will require you to
replace the alternator.
- Press the “ENTER” (MENU) button when the charging system test is completed. Turn off all
accessory loads and turn off the engine. Press the “ENTER” (MENU) again to return to
step 1 or remove the test clamps from the battery terminals after completion of testing,
to end the test. The screen will show “TEST OVER. TURN OFFLOADS & ENGINE”.
5. Language select
There are five languages you can choose from: English, Chinese, German, French, Spanish.
1. Connect the Battery System Tester to a vehicle battery.
2. The tester defaults to the BATTERY TEST display.
3. Press the “►” button twice to get to the LANGUAGE SELECT display.
4. Press “Enter” (MENU) button, the display will show all language options.
