106
Section 4 – Troubleshooting Information Electrical System
7. Loose or broken wire #14 from valve driver
J2 pin #5 to plug A pin #7 in platform control
console.
Check continuity. Replace if defective.
8. Loose or broken wire #14 in boom cable A or its
connectors.
Check for continuity between pins #7 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
9. Loose or broken wire #14 from base connector
plug A pin #7 to base terminal block.
Check continuity. Replace if defective.
No Boom Down from Base Console:
NOTE
Boom Down may be disabled by the dual load zone system. Please first ensure the boom is fully retracted
and there are no faults in the dual load system.
1. Loose or broken wire #10C from resistor R1 to
boom switch S12.
Check continuity. Replace if defective.
2. Defective boom switch S12. Check continuity through switch while activating
up function between wires #10A and #13. Replace
switch if no continuity.
3. Loose or broken wire #13 from boom switch S12
to base terminal block.
Check continuity. Replace if defective.
Follow the steps in No Boom Down from Base or
Platform Consoles: on page 107.
No Boom Down from Platform Console:
NOTE
Functions may be disabled by the dual load zone system and/or overload system if equipped. Please first
ensure the boom is fully retracted and there are no faults in the dual load/overload system.
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 y-axis of joystick controller A1 Refer to joystick test procedure in section 5.
4. Loose or broken wire “Y” from joystick controller
to J3 pin #16 of valve driver.
Check continuity. Replace if defective.
5. No output on J3 pin #24 of the valve driver to
wire #20B.
Check for 12 volts. If no voltage present with foot
on footswitch check section 5 for OCM pin voltage
reference.
6. No output on J2 pin #6 of the valve driver to wire
#14
Check for a minimum 3.5 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
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