53 No Reverse Drive; 54 The Brake Will Not Release; 55 No Left Steer - Skyjack SJ46 AJ+ Service Manual

Section 4 – Troubleshooting Information

4.2-53 No Reverse Drive

1. No output from base control module at connector
J2 pin #2 to wire #15
2. Loose or broken wire 15 from base control
module connector J2 pin #2 to turret connector
pin 20
3. Loose or broken wire #15 from turret plug pin 20
to drive pump valve connector pin #1
4. Loose or broken wire #15 from drive pump valve
connector pin #1 to 3H-15 Forward coil
5. Loose or broken wire #02 wire from 3H-15
Reverse coil to ground
6. Defective reverse coil 3H-15

4.2-54 The Brake will not Release

1. No output from base control module coneector
J3 pin #24 to wire #26
2. Loose or broken wire 26 from base control
module connector J3 pin #24 to turret harness
connector pin #8
3. Loose or broken wire #26 from turret harness
connector pin #8 to 3H-26 Brake coil
4. Loose or broken wire #02 wire from 3H-26 Brake
coil to ground
5. Defective brake coil 3H-26

4.2-55 No Left Steer

1. Loose or broken wire #24P from drive joystick
A2 to platform control module connector J12 pin
#15
2. No output from base control module on
connector J3 pin #13
3. Loose or broken wire #24 from base control
module connector J3 pin #13 to turret harness
connector pin #7
4. Loose or broken wire #24 from turret harness
plug pin #7 to left steer valve 4H-24
229042ABA
134
Check for correct output voltage.
Check continuity. Replace if defective
Check continuity. Replace if defective
Check continuity. Replace if defective
Check continuity. Replace if defective
Check continuity and resistance through coil.
Replace if defective
Check for correct output voltage
Check continuity. Replace if defective
Check continuity. Replace if defective
Check continuity. Replace if defective
Check continuity and resistance through coil.
Replace if defective
Check continuity. Replace if defective
Check pin #13 for 12 volts. If no voltage present
with foot on footswitch and activating steer function
check section 5 for OCM pin voltage reference
Check continuity. Replace if defective
Check continuity. Replace if defective
Electrical System - ANSI/CSA
SJ46 AJ+, SJ46 AJ, SJ51 AJ