Electrical System; All Controls Inoperative - Skyjack SJ3219 Service Manual

Section 4 – Troubleshooting Information

4.2 Electrical System

4.2-1 All Controls Inoperative

1. Control Module CM1 display is broadcasting an
error message.
2. Battery charger plugged into external power
source.
3. Batteries disconnected or faulty.
4. Dirty or loose battery terminals.
5. Battery charge low.
6. Main battery cables open or defective.
7. Fuse F1 defective or open.
8. Main battery disconnect switch S1 open or
defective.
9. Loose or broken wires from fuse F1 to Battery to
Main Disconnect S1
212508ADA
77
Check Control Module display screen and follow
instructions to clear error.
Disconnect charger cord.
(if equipped with Delta Q Charger) Check continuity
between wire #B+ and wire #37 on Delta Q
Charger to test the N.C. contact in Battery Charger
Cutoff Relay L1CR
(if equipped with other charger) Check continuity
between wire #08C and wire #37 on other Charger
to test the N.C. contact in the Battery Charger
Cutoff Relay L1CR.
Replace charger if contact is not closed when
unplugged from external power source
Check continuity of wire #37 from Battery Charger
Cutoff Relay L1CR to Control Module CM1 pin
#P4-10
Use HMI Diagnostic menu to make sure Input P4-10
signal is present.
Connect batteries and test each battery for proper
supply voltage
Clean and tighten connections.
Check each cell with a hydrometer. Reading should
be 1.275 (fully charged).
Recharge if low reading.
Replace if reading difference between cells is
0.050.
Check continuity. Replace if defective.
Replace fuse.
Close switch.
Check continuity between wire #03 and wire #03A
on switch.
Check continuity between wire #98A and wire
#98B on switch.
Replace switch if no continuity between either one
of the switch poles.
Check continuity to #03A. Replace if defective.
Electrical System
SJ3215, SJ3219