KNOWN INFO
TEST OPTIONS
REASON FOR QUESTION
WARNING
Read WARNING
on following page.
e89. ELECTRICAL SYSTEM DOES NOT MAINTAIN A CHARGE (CONT)
Voltage Test or
STE/ICE-R Test #89
8.
Engine oil pressure indicator
light illuminates.
OIL PRESS gage operates.
Engine starts.
Alternator belts OK.
Battery(ies) OK.
Engine oil pressure switch OK.
Relay K11 OK.
Dashboard cable assembly OK.
Engine control cable assembly
OK.
Alternator ground strap OK.
100 AMP alternator to reverse
polarity relay 12 vdc cable OK.
200 AMP alternator to terminal
block 12 VDC cable OK.
100 AMP alternator to reverse
polarity relay 24 VDC cable
OK.
200 AMP alternator to terminal
block 24 VDC cable OK.
Faulty alternator.
Faulty voltage regulator.
POSSIBLE PROBLEMS
Is the alternator output
within normal voltage range
for both 12 VDC and 24
VDC terminal studs with
a known good voltage
regulator?
TM 9-2320-365-20-1
2-1016.8 Change 1
With a known good voltage
regulator installed; if the
voltage regulator output is not
within normal range, the
alternator is faulty. If the
voltage regulator output is
within normal range, the
previous voltage regulator is
faulty.
YES
NO
Replace 100 AMP alternator (para 7-2)
or 200 AMP alternator (para 20-56).
Replace 100 AMP voltage regulator
(para 7-5) or 200 AMP voltage
regulator (para 20-57).
