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HYDRAULIC OIL COOLER FANS WILL NOT OPERATE. cont'd
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TM-5-2420-224-20-1 Tractor Wheeled 4x4 DED Small Emplacement Excavator (SEE) and High Mobility Material Handler (HMMH) Manual
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THROTTLE CONTROL SWITCH WILL NOT OPERATE (SEE). cont'd
TM 5-2420-224-20-1
Table 3-5. Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
ELECTRICAL SYSTEM (CONT)
75.
THROTTLE CONTROL SWITCH WILL NOT OPERATE (SEE).
NOTE
Vehicle MASTER disconnect switch must be ON and ignition switch set to ON.
Failure to do so will cause erroneous results.
Refer to wiring diagram (page 3-258) for all wiring repair steps.
Step 1.
Check for +24 VDC between wire 70T (1) and ground at tool switch (2).
If  +24 VDC is not present, repair wiring 70T between tool
switch and connector X.
If
+24 VDC is present, go to step 2.
Step 2. With tool switch (2) pulled on, check for +24 VDC between wire 71V (3)
and ground at tool switch.
If +24 VDC is not present, replace tool switch (page 4-162).
If +24 VDC is present, go to step 3.

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