TM 5-6115-596-14
Table 4-4. Electrical Troubleshooting (Generator
Sets serial numbers 923-001 thru 923-553)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
GENERATOR FAILS TO PRODUCE FULL OUTPUT VOLTAGE
Test 1. Disconnect circuit 950 lead and circuit 950A lead at
Rheostat. Place prods across connectors.
If reading is lower or higher than 5 to 100 ohms,
rheostat is defective. Refer to direct support
maintenance personnel.
Test 2.
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 3.
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).
Test 4.
Disconnect circuit 1 lead and circuit 50 leads at
generator.
Place prods across terminals A and E.
If reading is 0 ohms or infinity, replace
starter-generator (para. 5-17).
Disconnect circuit 1 lead and circuit 478 lead at
Test 5.
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. Disconnect wiring harness connectors at voltage regula-
tor. Place prods between CG-A, G, or H and voltage
regulator case.
If reading is lower or higher than 45 to 50 ohms,
voltage regulator is defective. Refer to direct
support personnel.
Test 2.
Check CG-C and E to case.
If reading is lower or higher than 2 ohms, regula-
tor is defective. Refer to direct support main-
tenance personnel.
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Change 2
