Skyjack SJ85 AJ Service Manual

101
SJ85 AJ 229044ADA
Electrical System Section 4 – Troubleshooting Information
All Controls Inoperative from Base 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. Defective ignition/enable switch S5. Check continuity through switch when activated.
Replace if defective.
2. Loose or broken wire #10A from ignition/enable
switch S5 to base terminal block.
Check continuity. Replace if defective.
3. Open or defective diode D10A. Check diode. Replace if defective.
4. Loose or broken wire #20 from diode D10A to
base terminal block.
Check continuity. Replace if defective.
5. Missing or broken terminal block jumper between
wire #20 and #21.
Check for jumper. Replace if missing or broken.
NOTE
The jumper is removed if the MEWP is equipped with a generator option.
6. Loose or broken wire #21 from base terminal
block to relay 21CR.
Check continuity. Replace if defective.
7. Loose or broken wire #21 from base terminal
block to relay 21CR.
Check continuity. Replace if defective.
8. Loose or broken wire #02 from base terminal
block to relay 21CR.
Check continuity. Replace if defective.
9. Defective relay 21CR. Check relay. Replace if defective.
10. Loose or broken wire #21A from relay 21CR to
main harness plug pin #3.
Check continuity. Replace if defective.
11. Loose or broken wire #21A from main harness
plug pin #3 to dump valve 2H-21A.
Check continuity. Replace if defective.
12. Loose or broken wire #02 from dump valve
2H-21A to main harness plug.
Check continuity. Replace if defective.
13. Defective dump valve coil 2H-21A. Check continuity and resistance through coil.
Replace if defective.
14. Loose or broken wire #10A from base terminal
block to 01ACR1 relay.
Check continuity. Replace if defective.
15. Defective relay 01ACR1. Check relay. Replace if defective.
16. Loose or broken wire #10B from 01ACR1 relay to
resistor R1.
Check continuity. Replace if defective.
17. Defective resistor R1. Check resistor, replace if defective.
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Skyjack SJ85 AJ Specifications

General

Brand	Skyjack
Model	SJ85 AJ
Category	Boom Lifts
Language	English