Skyjack 4632 - Page 72

SECTION 4, Page 4
SJIII Series - The Conventionals 129919
Troubleshooting Information - Electrical System
Probable Cause Remedy
1. Defective Neutral Switch (S7-1) in Joystick Controller
(S7).
2. Defective A/B switch (S7-4) in Joystick Controller
(S7).
3. Circuit Board (PWM) defective.
4. Loose or broken wire #59 from Joystick Controller
(S7) to Platform Terminal Block (TB-2).
5. Loose or broken wire #59 from Platform Terminal
Block (TB-2) to Base Terminal Block (TB-1).
1. Check switch. Replace if defective.
2. Check switch. Replace if defective.
3. Refer to Section 5, Joystick Controller Test
Procedure.
4. Check continuity. Replace if defective.
5. Check continuity. Replace if defective.
1. A/B Switch (S7-4) in Proportional Controller open
or defective.
2. Loose or broken wire “A” from Proportional
Controller (S7) to Lift/Drive Switch (S5).
3. Lift/Drive Switch (S5) defective.
1. Check switch. Replace if defective.
2. Check continuity. Replace if defective.
3. Check Switch. Replace if defective.
1. A/B Switch (S7-5) in Proportional Controller open or
defective.
2. Loose or broken wire “B” from Proportional
Controller (S7) to Lift/Drive Select Switch (S5).
3. Lift Drive Select Switch (S5) defective.
1. Check switch. Replace if defective.
2. Check continuity. Replace if defective.
3. Check switch. Replace if defective.
1. Loose or broken wire #14A from Base Terminal Block
(TB-1) to Up Valve Coil (3H-14A)
2. Defective Up Valve Coil (3H-14A)
3. Open Diode (D21A).
4. Open Diode (D14A).
5. Machine not level.
6. Loose or broken wire 19 from Base Terminal Block
(TB-1) to Tilt Switch (TS1).
7. Defective Tilt Switch (TS1).
8. Loose or broken wire #28 from Tilt Switch (TS1) to
Tilt Relay (28CR).
9. Loose or broken wire #02 from Tilt Switch (TS1) to
Terminal Strip (TB-1).
10. Defective Tilt Relay (28CR).
11. Loose or broken wire #19A from Tilt Relay (28CR)
to Pump Motor Contactor.
1. Check continuity. Replace if defective.
2. Check continuity through coil. Replace if defective.
3. Check diode. Replace if defective.
4. Check diode. Replace if defective.
5. Use on level surface.
6. Check continuity. Replace if defective.
7. Test Tilt switch. Replace if defective.
8. Check continuity. Replace if defective.
9. Check continuity. Replace if defective.
10. Check relay. Replace if defective.
11. Check continuity. Replace if defective.
4.1-6. No Up Function From Platform Or Base Controls
4.1-5. No Up Or Forward Only Function From Platform Controls
4.1-4. No Down Or Reverse Only Function From Platform Controls
4.1-3. Lift And Drive Inoperative From Platform Controls
4.1-2. All Controls Inoperative From Platform (continuted)
8. Check continuity. Replace if defective.
9. Check continuity. Replace if defective.
10. Check switch. Replace if defective.
8. Loose or broken wire #8 from Keyswitch (S3) to
Battery charge Indicator (BCI).
9. Loose or broken wire #8 from Battery Charge Indicator
(BCI) to Lift/Drive select switch (S5).
10. Defective Lift/Drive select switch (S5).