No Power; Engine Will Not Crank - Skyjack SJ85 AJ Service Manual

Electrical System

4.2-2 No Power

No Power to Platform:
1. Open or defective key select switch S2.
2. Loose or broken wire #07A from key select
switch S2 to platform emergency stop switch S4.
3. Open or defective platform emergency stop
switch S4.
4. Loose or broken wire #04A from platform
emergency stop switch S4 to Ignition switch S9.
No Power to Base:
1. Open or defective base key switch S2.
2. Loose or broken wire #12 from base key switch
S2 to Ignition/E-pump switch S4.
3. Open or defective emergency stop switch S4.
4. Loose or broken wire #10 from emergency stop
switch S4 to base ignition switch S5.
5. Open or defective Ignition/E-pump (enable)
switch S5.

4.2-3 Engine will not Crank

Engine will not Crank from Base:
1. Loose or broken wire #57A from base start
switch S5 to Engine electrical box connector J3
pin Pin 8.
Engine will not Crank from Platform:
NOTE
Engine will not crank with footswitch depressed or platform overloaded.
1. Loose or broken wire #57A from base start
switch S5 to Engine electrical box connector J3
pin Pin 8.
2. Loose or broken wire #57A from base start
switch S5 to Engine electrical box connector J3
pin Pin 8.
SJ85 AJ
Section 4 – Troubleshooting Information
Select platform position on key switch. Check
continuity through base key switch. Replace if
defective.
Check continuity. Replace if defective.
Check switch. Replace if defective.
Check continuity. Replace if defective.
Select base position on key switch. Check
continuity through base key switch. Replace if
defective.
Check continuity. Replace if defective.
Check switch is in on position. Check continuity
through switch. Replace if defective.
Check continuity. Replace if defective.
Check switch. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
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