TM 10-3930-641-20
ELECTRICAL SYSTEMS TROUBLESHOOTING (CONT)
(Sheet 2 of 3)
PROBLEM NO. 13 (CONT)
NOTE A: Voltage is checked to ground, see page 2-56.
NOTE B: After replacement, START engine to ensure problem is solved.
ANSWER
REMARKS
No
YES
STEP
QUESTION OR INSTRUCTION
Engine running. Parking Brake ON.
1
Remove engine lower right access covers. Test for voltage
2
3
(NOTE A) present at terminal no. 5 where LT BL wire
connects on alternator relay (4, page 2-70). Is voltage
present? (12 volts DC).
2
3
Do not get any part of your body, clothing or test
equipment near the alternator drive belts.
Test for voltage present at terminal R where LT BL wire
4
12 volts DC should be present.
5
4
Replace alternator. POWER switch OFF.
TA 098609
Go on to Sheet 3