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 845 of 1313
NO LIGHTS OPERATE WITH DIRECTIONAL SIGNAL CONTROL LEVER IN ANY POSITION - Continued
STEP
1.
IS THERE BATTERY VOLTAGE AT PIN G OF THE CONNECTOR CONTROL UNIT?
a.
Place battery switch to OFF position.
T0780DAA
STOP TURN
POSITION
CONNECTOR
ON CONTROL
UNIT HARNESS
VOM
G
LIGHT SWITCH
Figure 1.
Control Unit Harness Connector.
b.
Disconnect control unit harness connector from directional signal control unit.
c.
Place battery switch to ON position.
d.
Place lighting switch to STOP TURN position.
e.
Set up multimeter to measure VDC.
f.
Connect multimeter red lead to connector terminal point G. Refer to point to point schematics.
g.
Connect multimeter black lead to a known good ground.
h.
Meter reading should be greater than 18 VDC.
CONDITION/INDICATION
IS THERE BATTERY VOLTAGE AT PIN G OF THE CONNECTOR CONTROL UNIT?
DECISION
NO - Go to Step (2).
YES - Go to Step (5).
STEP
2.
IS THERE BATTERY VOLTAGE AT MAIN LIGHT SWITCH HARNESS CONNECTOR?
a.
Place battery switch to OFF position.
TM 9-2320-272-23-1
0098
0098-2
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