TM 9-2320-272-24-1
Table 2-3. Electrical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Assistant will help with step 4.
Step 4.
Have assistant position ignition switch to ON and push transfer case shift lever button.
Voltage should be present.
a. If voltage is present, linear valve is defective. Notify DS maintenance.
b. If voltage is not present, transfer case shift lever switch or wiring is defective. Notify
DS maintenance.
PROTECTIVE CONTROL BOX ASSEMBLY
46. PROTECTIVE CONTROL BOX ASSEMBLY TEST
Initial check - front wiring harness disconnected at box.
Step 1. Confirm that continuity exists between pin E and ground.
Step 2. Confirm that continuity exists between pins B and D, pins C and D, pin A and ground,
pin B and ground, pin C and ground, and pin D and ground.
Step 3. Apply 24 volts to pin A. Confirm that continuity exists between pins C and D, but not
between pins B and D.
Step 4. If findings are other than as indicated, protective control box is malfunctioning. Replace
protective control box (para. 3-115).
END OF TESTING!
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