TM 9-4910-663-34
Table 2-5. TROUBLESHOOTING (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
If continuity indication is not obtained, proceed to step 3; if continuity indication is obtained,
proceed directly to step 6.
Step 3.
Using DC voltmeter, check for 24 to 30 volts DC across coil terminals of relay K8.
If voltage is normal, replace relay K8; if no voltage or low voltage is obtained, proceed to step 4.
Step 4.
Set circuit breaker switch CB1 to OFF position. Using ohmmeter, check for continuity across
terminals of STARTER TEST switch S9 with one lead disconnected from switch terminal and switch
set to ON position.
Replace switch S9 if open indication is obtained.
Step 5.
With circuit breaker switch CB1 set to OFF position, reconnect lead disconnected in step 4, and
disconnect leads from one coil terminal of relay K8. Using ohmmeter, check for 60.3 to 70.4 ohm
resistance indication across coil terminals of relay K8.
Replace relay K8 if resistance is not as specified.
Step 6.
With circuit breaker switch CB1 set to OFF position, check for resistance indication of 1 ohm or less
across terminals of STARTER RHEOSTAT R18 with rheostat control turned clockwise until snug.
Repair rheostat R18 if resistance is above 1 ohm.
Step 7.
With circuit breaker switch CB1 set to OFF position, perform continuity check of starter test circuit,
including DC AMMETER LOAD & STARTER OUTPUT CURRENT BATTERY CHARGE CURRENT
RANGE switch S14, using ohmmeter.
Replace switch S14, if it is defective. Repair wiring defects.
11.
TACHOMETER RPM CIRCUIT
a.
TACHOMETER RPM CIRCUIT INOPERATIVE OR PROVIDES INCORRECT INDICATIONS DURING TEST OF
EXTERNAL COMPONENTS.
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