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 217 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

31.

INSTRUMENT PANEL GAGES NOT WORKING (Continued).

NOTE

• Determine which gage is not working by visual inspection, then go to the

proper step as listed below.

• If water temperature gage is not working, do step 8.

• If fuel gage is not working, do step 9.

• If voltmeter is not working, do step 10.

• If transmission oil temperature gage is not working, do step 11.

• If engine oil pressure gage is not working, do step 12.

8.

Check water temperature

gage:

a.

With a jumper wire,

Gage

Go to step b.

Replace gage

momentarily ground

operates.

(para 3-73).

circuit 55D-RD

terminal of water

temperature gage.

b.

With a jumper wire

Gage

Replace sending

Repair circuit

momentarily ground

operates.

unit (para

55D-RD and/or

circuit 55E-RD

3-101).

55D-RD (para

terminal of water

3-127).

temperature sending

unit.

2-92