Electrical System; All Controls Inoperative - Skyjack SJ30AJE Service Manual

Section 4 – Troubleshooting Information

4.2 Electrical System

4.2-1 All Controls Inoperative

1. Battery disconnected or discharged.
2. Loose or dirty battery cables.
3. Open or defective main power disconnect right
or left.
4. Charger plugged into AC source.
5. Loose or broken wire #60 from base terminal
block to charger cutout relay L1CR.
6. Defective relay L1CR.
7. Loose or broken wire #60A from charger cutout
relay L1CR to base terminal block.
8. Loose or broken wire #60A from base terminal
block to motor control harness A.
9. Loose or broken wire #60A from motor control
harness A pin #23 to left motor controller pin
#LM7.
10. Loose or broken wire #48+ from motor contactor
3CCR to diode D48+.
11. Open or defective diode D48+.
12. Loose or broken wire #48+ from diode D48+ to
fuse F1.
13. Defective fuse F1 (10Amp).
14. Loose or broken wire #03 from fuse F1 to base
emergency stop switch S6.
15. Defective base emergency stop switch S6.
16. Loose or broken wire #3A from base emergency
stop switch S6 to base key switch S3.
17. Defective base key switch S3.
18. Loose or broken wire #3B from base emergency
stop switch S6 to platform plug A pin #4 in base
control console.
19. Loose or broken wire #3B in boom cable A or its
connectors.
196274AF
84
Reconnect battery. Recharge if discharged.
Clean and tighten battery cables.
Close disconnect. Replace if defective.
Make sure batteries are charged. Unplug from AC
source.
Check continuity. Replace if defective.
Check relay. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check diode. Replace if defective.
Check continuity. Replace if defective.
Check fuse. Replace if defective.
Check continuity. Replace if defective.
Check switch. Replace if defective.
Check continuity. Replace if defective.
Check switch. Select either base or platform.
Replace if defective.
Check continuity. Replace if defective.
Check for continuity between pins #4 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Electrical System
SJ30AJE, SJ30ARJE