MAINTENANCE OF M939 SERIES VEHICLES - OD1661 - LESSON 1/TASK 2
FIGURE 28.
CONTINUITY READING OF SOCKETS
"A" ON THE TRAILER CONNECTING
CABLE.
NOTE
Wires M and N are not used and continuity is not
required.
Repeat the above test for each wire until all 10 wires have been
tested. Continuity should be indicated for each wire. Since it was
not indicated for wires C, F, and L, SGT Markum will repair each of
these wires.
When the wires have been repaired, SGT Markum will repeat the
continuity test to ensure that the malfunction has been corrected.
i.
Heater System Troubleshooting.
In the following paragraphs we
will follow SGT Pearlswieg as he troubleshoots the heater system for
the malfunction HEATER WILL NOT OPERATE IN LOW OR HIGH POSITION and
reaches the conclusion that the heater is defective and needs to be
replaced.
SGT Pearlswieg begins
by performing the preliminary procedures as
stated in paragraph
4h on page 60 of this task.
After the
have been completed, he is ready to begin the
actual troubleshooting
procedures.
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