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 169 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-10.

TROUBLESHOOTING SYMPTOM INDEX.

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM

17 ETHER SOLENOID FAILS TO OPERATE WHEN ETHER START SWITCH IS PUSHED.

1

Remove circuit breaker

bracket far enough to

access circuit breaker

CB-3 (para 3-114), and

go to step 2.

NOTE

Ignition switch must be in ON position

and battery power connected when doing

the following checks.

2

Check for voltage at

12-volts dc

Install circuit

Reset circuit

circuit 51-LG terminal

nominal

breaker bracket

breaker CB-3

of circuit breaker

(para 3-114),

and/or trouble-

CB-3

and go to step

shoot CB-3

3

circuit.

(Refer

to malfunction

33).

3

Check for voltage at

12-volts dc

Go to step 4

Repair circuit

circuit 51-LG terminal

nominal

51-LG (para

of ether start switch

3-127).

NOTE

Ether start switch must be pushed and

held when doing the following checks.

4

Disconnect circuit

51B-DG from solenoid

valve, and go to step

5.

5

Have assistant operate

12-volts dc

Go to step 6

Replace switch

ether start switch

nominal

(para 3-76).

while checking for

Connect circuit

voltage at circuit

51B-DG to

51A-DG terminal of

solenoid.

ether start switch.

2-44