Skyjack SJ85 AJ Service Manual page 104

Electrical System
7. Loose or broken wire #13 from valve driver
J2 pin #6 to plug A pin #6 in platform control
console.
8. Loose or broken wire #13 in boom cable A or its
connectors.
9. Loose or broken wire #13 from base connector
plug A pin #6 to base terminal block.
No Boom Down from Base or Platform Consoles:
1. Loose or broken wire #13 from base terminal
block to load sense/dual load zone module white
connector J4 pin 7.
2. No output on load sense/dual load zone module
white connector J4 pin 5 to wirer 13A.
3. Loose or broke wire #13A from load sense/dual
load zone module white connector J4 pin 5 to
harness plug pin #3.
4. Loose or broke wire #13A from harness plug pin
#3 to boom down valve 4H-13A.
5. Loose or broken wire #02 from turret harness
plug to boom down valve 4H-13A.
6. Defective boom down coil 4H-13A.
SJ85 AJ
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check for continuity between pins #6 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
Follow steps on No Boom Down from Base or
Platform Consoles: on page 107.
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.
229044ADA
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