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Electrical System Section 4 – Troubleshooting Information
9. Loose or broken wire #13 from base connector
plug A pin #6 to base terminal block.
Check continuity. Replace if defective.
10. Loose or broken wire #13 from base terminal
block to turret harness plug pin #3.
Check continuity. Replace if defective.
Go to No Boom Lower Function from Base or
Platform Control Consoles.
No Turret Left
1. Loose or broken wire #04 from platform terminal
block to joystick controller A1.
Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal
block to joystick controller A1.
Check continuity. Replace if defective.
3. No output on x-axis of joystick controller A1. Refer to joystick test procedure in section 5.
4. Loose or broken wire “X” from joystick controller
A1 to valve driver pin #28.
Check continuity. Replace if defective.
5. No output on pin #5 of the valve driver to wire
#20B.
Check pin #5 for 12 volts. If no voltage present with
foot on footswitch check section 5 for OCM pin
voltage reference.
6. No output on pin #20 of the valve driver to wire
#32.
Check pin #20 for minimum 3.5 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
7. Loose or broken wire #32 from valve driver
pin #20 to plug A pin #14 in platform control
console.
Check continuity. Replace if defective.
8. Loose or broken wire #32 in boom cable A or its
connectors.
Check for continuity between pins #14 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
9. Loose or broken wire #32 from base connector
plug A pin #14 to base terminal block.
Check continuity. Replace if defective.
10. Loose or broken wire #32 from base terminal
block to turret harness plug pin #10.
Check continuity. Replace if defective.
11. Loose or broken wire #32 from turret harness
plug pin #10 to turret left valve 4H-32.
Check continuity. Replace if defective.
12. Loose or broken wire #02 from turret harness
plug to turret left valve 4H-32.
Check continuity. Replace if defective.
13. Defective turret left valve coil 4H-32. Check continuity and resistance through coil.
Replace if defective.
No Turret Right
1. Loose or broken wire #04 from platform terminal
block to joystick controller A1.
Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal
block to joystick controller A1.
Check continuity. Replace if defective.
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