SECTION 4, Page 11
SJ-600 Series Engine Powered
112715
June 2001
ELECTRICAL SYSTEM
TROUBLESHOOTING INFORMATION
TROUBLE
PROBABLE CAUSE
REMEDY
1. Loose or broken wire #12 from key
select switch (S3) to low/high range
switch (S29).
2. Defective low/high range switch
(S29).
3. Loose or broken wire #20B from low/
high range switch (S29) to low/high
torque switch (S41).
4. Defective low/high torque switch
(S41).
5. Loose or broken wire #20 from high/
low torque switch (S41) to relay (20CR).
6. Defective relay (20CR).
7. Loose or broken wire #02 from relay
(20CR) to base terminal block.
8. Loose or broken wire #04 from base
terminal block to relay (35CR).
9. Defective relay (35CR).
10. Loose or broken wire #44 from relay
(35CR) to relay (20CR).
11. Loose or broken wire #20A from
relay (20CR) to base terminal block.
12. Loose or broken wire #20A from
base terminal block to series parallel
valve coil (3H20A).
13. Defective series/parallel valve coil
(3H20A).
14. Loose or broken wire #02 from
series/parallel valve coil (3H20A) to
base terminal block.
1. Lift/off/drive switch (S3) in drive
position or defective.
2. Loose or broken wire #09 from off/
lift/drive switch (S3) to hydraulic
generator switch (S12) or lift enable
switch (S9).
3. Loose or broken wire #09A from
hydraulic generator switch (S12) to
lift enable switch (S9).
4. Defective hydraulic generator switch
(S12).
5. Defective lift enable switch (S9).
6. Loose or broken wire #09B from lift
enable switch (S9) to up/off/down
switch (S5).
7. Defective up/off/down switch (S5).
8. Loose or broken wire #14 from up/
off/down switch (S5) to diode (D14).
9. Diode (D14) open.
10. Loose or broken wire #14 from diode
(D14) to base terminal block.
11. Loose or broken wire #14 from base
terminal block to relay (14CR).
1. Check continuity. Replace if
defective.
2. Check switch. Replace if defective.
3. Check continuity. Replace if
defective.
4. Check switch. Replace if defective.
5. Check continuity. Replace if
defective.
6. Check relay. Replace if defective.
7. Check continuity. Replace if
defective.
8. Check continuity. Replace if
defective.
9. Check relay. Replace if defective.
10. Check continuity. Replace if
defective.
11. Check continuity. Replace if
defective.
12. Check continuity. Replace if
defective.
13. Check coil. Replace if defective.
14. Check continuity. Replace if
defective.
1. Select lift position. Check switch.
Replace if defective.
2. Check continuity. Replace if
defective.
3. Check continuity. Replace if
defective.
4. Check switch. Replace if defective.
5. Check switch. Replace if defective.
6. Check continuity. Replace if
defective.
7. Check switch. Replace if defective.
8. Check continuity. Replace if
defective.
9. Check diode. Replace if defective.
10. Check continuity. Replace if
defective.
11. Check continuity. Replace if
defective.
HIGH/LOW RANGE
SPEED INOPERATIVE
UP CIRCUIT
INOPERATIVE FROM
PLATFORM OR BASE
Summary of Contents for SJ-7027
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