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Electrical System
4. Loose or broken wire 15 from valve driver J2 pin
#2 to plug B pin #4.
5. Loose or broken wire #15 in cable B or its
connectors.
6. Loose or broken wire #15 from base plug B pin
#5 to drive pump valve connector pin #1.
7. Loose or broken wire #15 from drive pump valve
connector pin #1 to 4H-15 Reverse coil.
8. Loose or broken wire #02 wire from 4H-15
Reverse coil to ground.
9. Defective reverse coil 4H-15.
No Left Steer:
1. Loose or broken wire #24 from drive joystick A2
to valve driver connector J2 pin #15.
2. No output from valve driver on connector J3 pin
#13.
3. Loose or broken wire #24A from valve driver
connector J3 pin #13 to plug A pin #10.
4. Loose or broken wire #24A in boom cable A or
its connectors.
5. Loose or broken wire #24A from base terminal
block to turret harness plug pin #7.
6. Loose or broken wire #24A or #02 from turret
harness plug to left steer valve 4H-24A.
7. Defective left steer valve coil 4H-24A.
No Right Steer:
1. Loose or broken wire #23 from drive joystick A2
to valve driver connector J2 pin #16.
2. No output from valve driver on connector J3 pin
#3.
3. Loose or broken wire #23A from valve driver
connector J3 pin #3 to plug A pin #9.
4. Loose or broken wire #23A in boom cable A or
its connectors.
SJ85 AJ
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check for continuity between pins #4 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
Check continuity. Replace if defective.
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.
Check continuity. Replace if defective.
Check for continuity between pins #10 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
Check continuity. Replace if defective.
Check pin #3 for 12 volts. If no voltage present
with foot on footswitch and activating steer function
check section 5 for OCM pin voltage reference.
Check continuity. Replace if defective.
Check for continuity between pins #9 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
229044ADA
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