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Electrical System Section 4 – Troubleshooting Information
5. Loose or broken wire #02 from turret harness
plug to left steer valve 4H-24
Check continuity. Replace if defective
6. Defective left steer valve coil 4H-24 Check continuity and resistance through coil.
Replace if defective
4.2-56 No Right Steer
1. Loose or broken wire #23P from drive joystick
A2 to platform control module connector J12 pin
#16
Check continuity. Replace if defective
2. No output from base control module on
connector J3 pin #3
Check pin #13 for 12 volts. If no voltage present
with foot on footswitch and activating steer function
check section 5 for OCM pin voltage reference
3. Loose or broken wire #23 from base control
module connector J3 pin 13 to turret harness
connector pin #6
Check continuity. Replace if defective
4. Loose or broken wire #23 from turret harness
plug pin #6 to right steer valve 4H-23
Check continuity. Replace if defective
5. Loose or broken wire #02 from turret harness
plug to right steer valve 4H-23
Check continuity. Replace if defective
6. Defective right steer valve coil 4H-23 Check continuity and resistance through coil.
Replace if defective
4.2-57 The Directon Sensing is Inoperative
1. Loose or broken wire #09 from base terminal
block to limit switch LS1
Check continuity. Replace if defective
2. Open or defective limit switch LS1 Adjust limit switch if required. Check continuity
through switch. Replace if defective
3. Loose or broken wire #17 from limit switch LS1
to base terminal block
Check continuity. Replace if defective
4. Loose or broken wire #17 from base terminal
block to base control module connector J2 pin
#25
Check continuity. Replace if defective
5. Defective base control module channel input for
direction sense enable
Replace if Defective
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