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 412 of 926

TM 9-2320-283-20-1

TROUBLESHOOTING.

2-11. TROUBLESHOOTING PROCEDURES (Continued).

MALFUNCTION

INSTRUCTION

INDICATION

YES

NO

90.

BOTH UTILITY OUTLET RECEPTACLES NOT WORKING (Continued).

5.

Remove right side trim

panel far enough to

access utility outlet

receptacle (para

3-276), and go to step

6.

6.

Check for voltage at

12-volts dc

Go to step 7.

Repair circuit

circuit 21A-PP terminal

nominal.

21A-PP (para

of utility outlet

3-127).

Install

receptacle.

trim panel

NOTE

With positive lead on circuit 21APP (or suitable

12volt

power

lead), check

ground with negative

lead when doing the following checks.

7.

Check for voltage at

12-volts dc

Go to step 8.

Clean and

circuit 98F-BK ground

nominal.

tighten ground

point of instrument

point

connec-

panel.

tions.

Install

trim panel

(para 3-276).

2-286