ALL MACHINE (HYDRAULIC) TOOLS WILL NOT OPERATE

TM 5-2420-224-20-1

Table 3-5. Troubleshooting (Cont)

Malfunction

Test or Inspection

Corrective Action

ELECTRICAL SYSTEM (CONT)

76. ALL MACHINE (HYDRAULIC) TOOLS WILL NOT OPERATE

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 for all wiring repair steps.

Check for +24 VDC between wire 70T (1) and ground at tool switch (2).

Step 1.

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 71T (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.

Step 3. With tool switch (2) pulled on, check for +24 VDC between wire 71T (3)

and ground at machine tool solenoid (4).

If +24 VDC is not present, repair wiring 71T between tool

switch and machine tool solenoid.

If +24 VDC is present, notify direct support maintenance.