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Section 4 – Troubleshooting Information Electrical System
8. 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.
9. No output on pin #12 of the valve driver to wire
#39.
Check pin #12 for minimum 3.5 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
10. Loose or broken wire #39 from valve driver pin
#12 to plug B pin #9 in platform control console.
Check continuity. Replace if defective.
11. Loose or broken wire #39 in boom cable B or its
connectors.
Check for continuity between pins #9 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
12. Loose or broken wire #39 from base connector
plug B pin #9 to base terminal block.
Check continuity. Replace if defective.
No Platform Rotate or Jib Function
1. Loose or broken wire #08 from platform terminal
block to rotate switch S20 and jib switch S21.
Check continuity. Replace if defective.
2. No output on pin #21 of the valve driver to wire
#42.
Check pin #20 for minimum 3.5 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
3. Loose or broken wire #42 from valve driver
pin #21 to plug B pin #24 in platform control
console.
Check continuity. Replace if defective.
4. Loose or broken wire #42 in boom cable B or its
connectors.
Check for continuity between pins #24 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
5. Loose or broken wire #42 from base connector
plug B pin #24 to base key switch S2.
Check continuity. Replace if defective.
6. Loose or broken wire #42 from base key switch
S2 to turret harness plug pin #16.
Check continuity. Replace if defective.
7. Loose or broken wire #42 from turret harness
plug pin #16 to proportional flow enable valve
2H-42.
Check continuity. Replace if defective.
8. Loose or broken wire #02 from turret harness
plug to proportional flow enable valve 2H-42.
Check continuity. Replace if defective.
9. Defective proportional flow enable valve 2H-42. Check continuity and resistance through coil.
Replace if defective.
No Platform Rotate Left
1. Defective platform rotate switch S20. Check continuity through switch while activating
rotate left function between wires #08 and #36.
2. Loose or broken wire #36 from platform rotate
switch S20 to platform terminal block.
Check continuity. Replace if defective.
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