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 179 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

20 STARTER FAILS TO OPERATE (Continued).

8

Check for voltage at

24-volts dc

Go to step 9

Replace neutral

circuit 47A-TN terminal nominal

safety switch

of neutral

(para 3-106).

safety switch.

9

Check for voltage at

24-volts dc

Go to step 10

Repair circuit

circuit 47B-TN terminal nominal

47B-TN and/or

of starter

47A-TN (para

relay

3-127).

NOTE

With positive lead on circuit 47B-TN, check ground with

negative lead when doing the following checks.

10

Check for voltage at

24-volts dc

Go to step 11

Tighten and/or

circuit 98F-BK ground

nominal

clean connection.

point of instrument

panel.

11

Check for voltage at

24-volts dc

Go to step 12

Repair circuit

circuit 98F-BK terminal- nominal

98F-BK (para

of start switch

3-127).

2-54