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 206 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11.

TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

28.

LOW AIR PRESSURE INDICATOR AND/OR BUZZER NOT WORKING (Continued).

5

Check for voltage at

12-volts dc

Go to step 6

Repair circuit

circuit 53A-DB ter-

nominal

53A-DB (para

minal of buzzer

3-127).

NOTE

With positive lead on circuit 53A-DB, check for ground with negative lead when doing the following checks.

6

Check for voltage at

12-volts dc

Go to step 7

Clean and/or

circuit 99E-BK ground

nominal

tighten ground

point of instrument

point connec-

panel

tion.

2-81