TM 10-3930-641-20
ELECTRICAL SYSTEMS TROUBLESHOOTING (CONT)
(Sheet 2 of 3 )
PROBLEM NO. 12 (CONT)
NOTE 1: When testing for voltage, negative lead from your multimeter should be to ground (machine frame, etc.). See page 2-57.
NOTE 2: Always replace a wire with the same size (gage).
NOTE 3: After repair/replacement, turn POWER and PANEL TEST switches to ON to ensure problem is solved.
ANSWER.
YES
NO
STEP
QUESTION OR INSTRUCTION
REMARKS
--
--
Reach under each instrument panel and make sure harness
Total of eight (8) connectors.
connectors are properly seated.
Place PANEL TEST switch in down, OFF, position. With
1
2
6
POWER switch in ON position, are PRESTART and
Is no. 1 fuse (below TAIL/PANEL switch) good?
3
2
4
--
--
Replace fuse (10 amp). NOTE 3.
3
Wire color at PRESTART sockets is BR/B.
4
Gain access to rear of Left Hand Instrument PANEL (LHIP).
6
5
Is voltage present (NOTE 1) at each lamp socket and at fuse-
holder where Y/BR wire connects?
Correct opening in 18 gage Y/BR wire from lamp sockets to
5
Gain access to rear of Right Hand Instrument Panel. Is voltage
6
7
10
present at PANEL TEST switch terminal 4 where BK/Y wire
connects?
Go on to Sheet 3
2-99