Skyjack SJ85 AJ Service Manual page 111

Section 4 – Troubleshooting Information
No Boom Extend from Base or Platform Consoles:
1. Loose or broken wire #39 from base terminal
block to load sense/dual load zone module white
connector J4 pin 6.
2. No output on load sense/dual load zone module
white connector J4 pin 3 to wirer 39A.
3. Loose or broke wire #39A from load sense/dual
load zone module white connector J4 pin 3 to
harness plug pin #13.
4. Loose or broke wire #39A from harness plug pin
#13 to boom extend valve 4H-39A.
5. Loose or broken wire #02 from turret harness
plug to boom extend valve 4H-39A.
6. Defective boom extend coil 4H-39A.
229044ADA
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Check continuity. Replace if defective.
Check pin #5 for 12 volts. If no voltage present
when operating down function check section 5 for
module information.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
Electrical System
SJ85 AJ