TM 5-3805-258-24-2
DISASSEMBLY AND ASSEMBLY
ENGINE
DELCO REMY ALTERNATOR TESTING
Tools Needed:
Multimeter
FIELD COIL TESTS
1. To check for grounds, connect a test lamp,
or an ohmmeter, to one field coil lead and to
the end frame as shown. If the lamp lights or
if the ohmmeter reading is low (less than
10K), the field coil is grounded.
2. To check for opens, connect a test lamp, or
an ohmmeter to the field coil leads as shown.
If the lamp fails to light, or if the ohmmeter
reading is high (infinite), the field coil is
open.
3. The windings can be checked for shorted
circuits by connecting a battery and ammeter
in series with the field coil. The specified
field current is 2.5 to 2.9A at 80°F. An
ammeter reading above the specified value
indicates shorted windings.
DIODE TESTS
1. Check each of the six diodes by removing
each diode lead from the stud and connecting
an ohmmeter (set at lowest range) to the
diode lead and case. Reverse thr ohmmeter
leads to the diode lead and case.
2.
5-12n
If both readings are the same, replace the
regulator assembly. A good diode will have
one high and one low reading.
