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SJ30AJE, SJ30ARJE196274AF
Section 4 – Troubleshooting Information Electrical System
4.2-18 No Jib Rotate Left from Base Control Console
1. Loose or broken wire #10A from enable switch
S21 to jib rotate switch S15.
Check continuity. Replace if defective.
2. Defective jib rotate switch S15. Check continuity through switch while activating jib
rotate left function between wires #10A and #42. If
no continuity found, replace switch.
3. Loose or broken wire #42 from jib rotate switch
S15 to base terminal block.
Check continuity. Replace if defective.
4. Open or defective diode D42. Check diode. Replace if defective.
5. Loose or broken wire #73 from base terminal
block to motor control harness A.
Check continuity. Replace if defective.
6. Loose or broken wire #73 from motor control
harness A pin #22 to left motor controller pin
#LM32.
Check continuity. Replace if defective.
7. Loose or broken wire #42 from base control
block to platform plug B pin #12 in base control
console.
Check continuity. Replace if defective.
8. Loose or broken wire #42 in boom cable B or its
connectors.
Check for continuity between pins #12 on cable
B. Check for loose or corroded connections on
cable connectors. Replace if wire is defective.
9. Loose or broken wire #42 plug B pin #12 to
platform terminal block.
Check continuity. Replace if defective.
10. Loose or broken wire #42 from platform terminal
block to jib rotate left valve 4H-42.
Check continuity. Replace if defective.
11. Loose or broken wire #02 from platform terminal
block to jib rotate left valve 4H-42.
Check continuity. Replace if defective.
12. Defective platform jib rotate left coil 4H-42. Check continuity and resistance through coil.
Replace if defective.
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