TM 5-6115-596-14
Table 4-4.1 Electrical Troubleshooting (Generator
Sets serial numbers 929-001 thru 929-290)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
GENERATOR FAILS TO PRODUCE REQUIRED OUTPUT VOLTAGE
Test 1. Disconnect circuit 2 lead and circuit 478 lead at
generator.
Place prods across terminals B and D.
If reading shows an open circuit, replace
starter-generator (para. 5-17).
Test 2.
Disconnect circuit 478 lead and circuit 50 leads at
generator.
Place prods across terminals D and E.
If reading shows an open circuit, replace
starter-generator (para. 5-17).
Disconnect circuit 1 lead and circuit 50 leads at
Test 3.
generator.
Place prods across terminals A and E.
If reading is 0 ohms or infinity, replace
starter-generator (para. 5-17).
Test 4.
Disconnect circuit 1 lead and circuit 478 lead at
generator.
Place prods across terminals A and D.
If reading shows an open circuit, replace
starter-generator (para. 5-17).
2.
GENERATOR FAILS TO OPERATE
Test 1.
If output voltage is zero volts, press reset button
on regulator assembly with generator set in operation.
If operation is restored, then the fault was a
transient over voltage condition that could result
from a transient change in output loading.
Test 2.
With generator set OFF check the drive belt tension.
Excessive slippage will result in a low or zero
generator output.
Test 3.
Disconnect wiring harness connectors at start switch.
Place prods across connectors through switch.
If reading shows an open circuit, with switch
depressed, switch is defective. If reading is
lower than infinity with switch not depressed,
switch is defective. Refer defective switch to
direct support maintenance personnel.
4-14.1
Change 2
