matson BT900 - CHARGING SYSTEM WITH ACCESSORY LOADS (DETAILED)

DIGITAL BATTERY TESTER
| 15BT900
SYSTEM TEST
ALT. LOAD VOLTS
xx.xx V HIGH
9. Press the «ENTER» key to continue the charging system with accessory loads. One of
the three results will be displayed along with the actual testing measured.
CHARGING SYSTEM HIGH WHEN TEST
WITH ACCESSORY LOADS
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 regulator. Since most alternators
have the regulator built-in, this will require
you to replace the alternator.
CHARGING SYSTEM LOW WHEN TEST
WITH ACCESSORY LOADS
The alternator is not providing sucient
current for the system’s electrical loads and
the 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
xx.xx V LOW
ALT. LOAD VOLTS
xx.xx V NORMAL
CHARGING SYSTEM NORMAL WHEN TEST
WITH ACCESSORY LOADS
The system is showing normal output from
the alternator. No problem detected.