TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 182 of 1015
TM 9-2320-272-24-1
ELECTRICAL TROUBLESHOOTING SYMPTOM INDEX (Contd)
MALFUNCTION
NO.
MALFUNCTION
TROUBLESHOOTING
PROCEDURE
PAGE
35.
36.
37.
38.
39.
40.
41.
42.
43.
44.
45.
46.
Spring brake warning light inoperative with spring brake override
engaged.
......................................................
TRAILER CONNECTION SYSTEM
One or more lighting systems do not light on trailer.
....................
HEATER SYSTEM
Heater will not operate with switch in LOW position
(HIGH position operation normal).
.........
: .......................
Heater will not operate with switch in HIGH position
(LOW position operation normal).
..................................
Heater will not operate in LOW or HIGH position .
.....................
100-AMP ALTERNATOR KIT
Batteries hot or boiling; correct specific gravity of all cells is 1.280 .
........
Batteries use excessive water.
......................................
Batteries run down in service .
.....................................
No alternator output .
............................................
TRANSFER CASE SYSTEM
Transfer case control lever will not shift from LOW to HIGH or HIGH to LOW
when vehicle is in motion.
........................................
Transfer case shifts hard while engine is running.
......................
PROTECTIVE CONTROL BOX ASSEMBLY
Protective control box assembly test .
................................
2-161
2-163
2-165
2-167
2-168
2-169
2-170
2-170
2-170
2-174
2-175
2-176
2-94
Back to Top
