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TM1O-393O-66O-2O
Table 2-2.
Electrical Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
l Result of #89 starter solenoid voltage drop test should be less than
0.3 volts.
Result of #71 starter current average test should be between 0 and
250 amps.
l Result of #72 starter current first peak test should be between 300
and 1000 amps.
If test parameters are not met, check for loose or corroded connections
at battery and starting motor. Inspect, clean, and tighten all
connections as required.
Step 3. Check for proper engine oil.
Verify oil weight with oil sample (TM10-3930-660-10).
If incorrect,
drain and add correct oil. (see LO10-3930-660-12).
4. STARTER MOTOR KEEPS RUNNING
Step 1. Check for defective starter switch or short in wiring harness.
Test starter switch and wiring harness for continuity, para. 8-46 and
8-47. Repair or replace as necessary, para. 8-9, 8-46, and 8-47.
Step 2. Check for defective starter relay.
Test starter relay for continuity.
Replace if defective, para. 8-22.
GAUGES AND METERS
5. ALL GAUGES AND HOURMETER DO NOT WORK
Step 1. Check if circuit breaker (CB1) is tripped
l The circuit breakers will trip if there is a shorted or grounded wire.
. The circuit breakers will automatically reset after cooling. They
cannot be reset manually.
l Under normal operating conditions, circuit breakers should never
require replacement. However, if a circuit breaker does not reset
after it has cooled, the circuit breaker is defective and must be
replaced, para. 8-12.
2-14
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