TM-9-2320-272-23-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5
SEPTEMBER 2012
TM-9-2320-272-23-1 - Page 809 of 1313
HEADLAMP (BOTH SIDE) INOPERATIVE - Continued
STEP
5.
IS MAIN LIGHT SWITCH OPERATING PROPERLY?
a.
Place battery switch to OFF position.
T0756DAA
Figure 5.
Main Lighting Switch Connector.
b.
Connect jumper cable from socket pin F to socket pin M.
c.
Place battery switch to ON position.
NOTE
If headlamps light, lighting switch is not operating properly.
d.
Look for lighted headlamps.
CONDITION/INDICATION
IS MAIN LIGHT SWITCH OPERATING PROPERLY?
DECISION
YES - Repair or replace circuit wire 16 (Volume 3, WP
0352). Go to Step (6) to verify problem is solved.
NO - Replace defective main light switch (Volume 2, WP
0315). Go to Step (6) to verify problem is solved.
STEP
6.
IS YOUR ORIGINAL LIGHTING PROBLEM STILL PRESENT?
a.
Ensure vehicle is returned to normal operating condition.
b.
Check to see if your original lighting problem still exists.
CONDITION/INDICATION
IS YOUR ORIGINAL LIGHTING PROBLEM STILL PRESENT?
DECISION
YES - Notify supervisor.
NO - Problem fixed.
END OF WORK PACKAGE
TM 9-2320-272-23-1
0093
0093-6
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