Skyjack SJ85 AJ Service Manual

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SJ85 AJ229044ADA
Section 4 – Troubleshooting Information Electrical System
11. loose or broken wire 42A from turret harness plug
pin 11 to 2H-42A flow enable valve.
Check continuity. Replace if defective.
12. loose or broken wire 02 from 2H-42A flow enable
valve to ground.
Check continuity. Replace if defective.
4.2-12 No Drive or Steer
No Drive or Steer Functions:
1. Loose or broken wire #4 from platform terminal
block to drive joystick A2.
Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal
block to drive joystick A2.
Check continuity. Replace if defective.
3. Defective drive joystickA2. See drive joystick test procedure in section 5.
No Forward Drive:
1. No output on “D” when forward is selected on
drive joystick A2.
See drive joystick test procedure in section 5.
2. Loose or broken wire ”D-signal” from drive
joystick A2 to J3 pin #14 of valve driver .
Check continuity. Replace if defective.
3. No output from valve driver J2 pin #1 to wire
#16.
Check continuity. Replace if defective.
4. Loose or broken wire 16 from valve driver J2 pin
#1 to plug B pin #5.
Check continuity. Replace if defective.
5. Loose or broken wire #16 in cable B or its
connectors.
Check for continuity between pins #5 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
6. Loose or broken wire #16 from base plug B pin
#5 to drive pump valve connector pin #4.
Check continuity. Replace if defective.
7. Loose or broken wire #16 from drive pump valve
connector pin #4 to 4H-16 Forward coil.
Check continuity. Replace if defective.
8. Loose or broken wire #02 wire from 4H-16
Forward coil to ground.
Check continuity. Replace if defective.
9. Defective forward coil 4H-16. Check continuity and resistance through coil.
Replace if defective.
No Reverse Drive:
1. No output on “D” when forward is selected on
drive joystick A2.
See drive joystick test procedure in section 5.
2. Loose or broken wire ”D-signal” from drive
joystick A2 to J3 pin #14 of valve driver .
Check continuity. Replace if defective.
3. No output from valve driver J2 pin #2 to wire
#15.
Check continuity. Replace if defective.
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Skyjack SJ85 AJ Specifications

General

Brand	Skyjack
Model	SJ85 AJ
Category	Boom Lifts
Language	English