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 185 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).

Check for shorts to ground:

a

Disconnect battery

ground cable at

battery (para 3-120).

b

Set multimeter to 50

volts dc.

c

Turn all electrical

systems off (Refer

to TM 9-2320-283-10).

d

Unplug tachometer

clock at back of

tachograph (para

3-309).

e

Connect positive

meter lead to removed

ground cable and

negative meter lead

to battery negative

terminal.

f

Observe meter

Any voltage

Go to step g

Test batteries.

indication

(Refer to mal-

function 18,

step 4).

2-60