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 181 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).

NOTE

The start switch must be pushed and held when doing steps 12 thru 18.

12

Check for voltage at

24-volts dc

Go to step 13

Replace switch

circuit 46-BR terminal

nominal

(para 3-75).

of start switch.

13

Check for voltage at

24-volts dc

Go to step 14

Repair circuit

circuit 46-BR terminal

nominal

46-BR (para

of starter relay

3-127).

14

Release and depress

Starter relay

Go to step 15

Replace starter

start switch

should oper-

relay (para

ate (clicking

3-115).

sound).

NOTE

With negative lead on a good chassis or body ground, use positive lead when doing the following checks.

15

Check for voltage at

24-volts dc

Go to step 16

Replace starter

circuit 46D-BR terminal

nominal

relay (para

of starter relay

3-115).

16

Check for voltage at

24-volts dc

Go to step 17

Repair circuits

circuit 46E-BR terminal

nominal

46E-BR and/or

of starter motor

46D-BR (para

solenoid

3-127).

2-56