13 Left Steer Inoperative; 14 Drive Only Inoperative; 15 No Drive Or Steer When Platform Elevated - Skyjack SJIII 3215 Service Manual

Section 4 - Troubleshooting Information
Electrical System (Continued)

4.1-13 Left Steer Inoperative

1. Defective left steer switch S7-3.
- Check switch. Replace if defective.
2. Loose or broken wire #24 from right steer switch S7-3 to base terminal block.
- Check continuity. Replace if defective.
3. Loose or broken wire #24 from base terminal block to steer left valve coil 4H-24.
- Check continuity. Replace if defective.
4. Defective steer left valve coil 4H-24.
- Check continuity through coil. Replace if defective.
5. Loose or broken wire #02 from steer left valve coil 4H-24 to base terminal block.
- Check continuity. Replace if defective.
6. Open diode D24.
- Check diode. Replace if defective.

4.1-14 Drive Only Inoperative

1. Open or defective diode D17-1.
- Check diode. Replace if defective.
2. Loose or broken wire #59B from lift speed relay 14CR to high speed relay 21CR.
- Check continuity. Replace if defective.
3. Defective relay 14CR.
- Check relay. Replace if defective.

4.1-15 No Drive or Steer when Platform Elevated

1. Pothole protection bars not fully lowered.
- Clear obstructions. Repair as needed.
2. Loose or broken wire #71 from base terminal block to pothole protection limit switch LS4.
- Check continuity. Replace if defective.
3. Defective pothole protection limit switch LS4.
- Check switch. Replace if defective.
4. Loose or broken wire #72 from pothole protection limit switch LS4 to base terminal block.
- Check continuity. Replace if defective.
5. Loose or broken wire #72 from base terminal block to pothole protection limit switch LS5.
- Check continuity. Replace if defective.
6. Defective pothole protection limit switch LS5.
- Check switch. Replace if defective.
7. Loose or broken wire #19 from pothole protection limit switch LS5 to base terminal block.
- Check continuity. Replace if defective.
SKYJACK, Page 10
Service and Maintenance
SJIII DC Electric
SJIII 3215 SJIII 3219
165983