TM-9-2320-283-20-1
TRUCK TRACTOR, LINE HAUL, 50,000 GVWR, 6X4, M915A1
TECHNICAL MANUAL; ORGANIZATIONAL MAINTENANCE PART 1 OF 3
DECEMBER 1983
TM-9-2320-283-20-1 - Page 186 of 926
TM 9-2320-283-20-1
TROUBLESHOOTING.
2-11.
TROUBLESHOOTING PROCEDURES (Continued).
MALFUNCTION
INSTRUCTION
INDICATION
YES
NO
21.
BATTERIES DO NOT HOLD A CHARGE (ELECTRICAL SYSTEM SHORTED) (Continued).
Check for shorts to ground
(continued):
g
Remove each relay,
0 voltage
Check for
Go to step i.
one at a time, until
indication
defective
meter drops to 0
circuit, and
volts
repair (Refer
to para 3-127
and Appendix
D) If OK, go
to step h.
h
Remove electrical
0 voltage
Replace
Go to step k.
components in faulty
indication
defective
circuit, one at a
components.
time, until meter
drops below 0 volts.
i
Remove one wire at a
0 voltage
Check for
Go to step j.
time from circuit
indication
defective
breakers CB-1 thru
circuit, and
CB-9, until meter
repair (Refer
drops to 0 volts
to para 3-127
and Appendix
D) If OK, go
to step j.
j
Remove electrical
0 voltage
Replace
Go to step k.
components in faulty
indication
defective
circuit, one at a
components.
time, until meter
drops to 0 volts.
k
Install tachograph
clock connector (para
3-309), and go to
step 1.
l
Remove meter, and
connect battery
ground cable (para
3-120).
2-61
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