TM 5-5420-234-14&P
4-12. UNIT TROUBLESHOOTING (continued).
4.
MAIN FRAME WORKLIGHT DOES NOT OPERATE.
INITIAL SETUP
Tools and Special Tools
Equipment Condition
Multimeter (ANURM105C)
Engine turned off (TM 9-2320-279-10)
Tool Kit, General Mechanic's: Automotive
Parking brake applied (TM 9-2320-279-10)
(SC 5180-90-N26)
Wheels chocked (TM 9-2320-279-10)
START
1.
TEST OPTIONS
KNOWN INFO
Continuity Test.
Error Code, EC 12.
Is the worklight bulb
OK?
REASON FOR QUESTION
POSSIBLE PROBLEMS
Worklight will not
Worklight bulb faulty.
operate if filament inside
Worklight switch faulty.
bulb is burned out.
Wire no. 40 faulty.
Supply harness faulty.
Cab control box faulty.
Linking harness faulty.
Main junction box faulty.
Main frame junction box
Repair worklight
NO
harness faulty.
Worklight harness faulty.
YES
Change 1
