Table 3-7. Blade Pro Motor Grader Control System Troubleshooting (Cont)
Test or Inspection
FAULT 3-1. OPERATOR INTERFACE BOX WILL NOT TURN ON. (Cont)
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).
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
If batteries are serviceable, replace Power Cable (2).
FAULT 3-2. AUTO
AND MANUAL LEDs
ON SAME SIDE
OF CONTROL BOX.
Check Automatic and Manual LEDs light at same time when Blade Pro Motor Grader
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.