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 256 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

40.

INSTRUMENT PANEL GAGE LAMP OR LAMPS NOT WORKING.

NOTE

•

Headlamp

rheostat

switch

must

be rotated fully

clockwise and pulled out to ON position when doing

the following checks.

•

Do steps 1 thru 5 only if all lamps are not working.

•

Do steps 6 thru 8 only if one lamp is not

working.

Faulty

fuel

lamp

is shown in this procedure.

1.

Check for voltage at

12-volts dc

Go to step 2.

Refer to mal-

circuit 29-BR terminal

nominal.

function 44.

Of headlamp switch.

TA 236873

2-131