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5.4.4.
Press ENTER to begin charging system test.
PRESS ENTER FOR
CHARGING TEST
5.4.5.
Press the ENTER key, one of the three results will be displayed along with the actual reading measured.
HIGH CHARGING VOLTS WHEN TESTED AT IDLE
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 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 14.7 volts +/- 0.05. Check manufacturer's specifications for the correct limit, as it will
vary by vehicle type and manufacturer.
CHARGING SYSTEM NORMAL WHEN TEST AT IDLE
The system is showing normal output from the alternator. No problem is detected.
LOW CHARGING VOLTS WHEN TEST AT IDLE
The alternator is not providing sufficient current to the battery. Check the belts to ensure the
alternator is rotating with 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
condition, replace the alternator.
5.4.6.
Press ENTER for the charging system with accessory loads. Turn on the blower to high (heat),
high beam headlights, and heated rear window. Do not use cyclical loads such as air conditioning
or windshield wipers.
5.4.7.
When testing older model diesel engines, run the engine up to 2500rpm for 15 seconds.
5.4.8.
Press «ENTER» to read the ripple from the charging system to the battery. One of the three testing results will be displayed
along with the actual testing measured.
RIPPLE DETECTED NORMAL
Diodes function well in the alternator/starter.
NO RIPPLE DETECTED
Ripple is not detected.
© Jack Sealey Limited
Original Language Version
MAKE SURE ALL LOADS ARE
OFF
ALT. IDLE VOLTS
XX.XX V HIGH
ALT. IDLE VOLTS
XX.XX V NORMAL
ALT. IDLE VOLTS
XX.XX V LOW
TURN ON LOADS
PRESS ENTER
RUN ENGINE UP TO 2500RPM
15 SEC
RIPPLE
DETECTED
XX.XX V
NORMAL
NO RIPPLE DETECT
PRESS ENTER
BT2011 | Issue:1 02/03/20
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