TM 5-6675-348-13&P
Table 3-7. Blade Pro Motor Grader Control System Troubleshooting (Cont)
Malfunction
Test or Inspection
Corrective Action
FAULT 3-1. OPERATOR INTERFACE BOX WILL NOT TURN ON. (Cont)
Step 7.
Check for a good ground on pins B and C of Power Cable (2).
If a good ground is not found, replace Power Cable (2).
Step 8.
Check for 22 to 28 Vdc on pins A and D of Power Cable (2).
If 22 to 28 Vdc is not found on pins A and B, check and service batteries, if needed
(TM 5-3805-261-20).
If batteries are serviceable, replace Power Cable (2).
FAULT 3-2. AUTO AND MANUAL LEDs ARE LIT ON SAME SIDE OF CONTROL BOX.
Check Automatic and Manual LEDs light at same time when Blade Pro Motor Grader
Step 1.
Control System is turned on and you cannot grade in Automatic.
Place R/L Switches (1) in Manual position, then place them in Automatic position.
