JLG Skytrak 6036 Service Manual page 260

Section 10. Electrical System
Trouble
Warning Devices—PARK LOCK WARNING LIGHT (cont'd)
Park lock warning
bulb lights when
park lock brake
switch is DOWN
(disengaged).
Bulbs in warning
lights gauge don't
light when test
button is pressed.
Bulbs in warning
lights gauge light
continuously
when ignition key
switch is in the
RUN position.
Loss of electrical
power for some
but not all forklift
operations.
Circuit breaker
continuously trips.
Overheating and
burnout of wiring
and forklift
electrical
components.
10-66
Probable Cause
1. Short circuit in wiring.
2. Defective park lock brake
switch (46, Fig. 10.5).
Warning Devices—WARNING LIGHTS
1. Bulbs are burned out.
2. No voltage at warning
lights gauge (51, Fig.
10.5); loose or broken
wiring or circuit breaker
(12) doesn't reset.
3. Defective sender switches.
1. Defective test switch (47,
Fig. 10.5).
2. Short circuit in wiring.
3. Defective sender switches.
CIRCUIT BREAKERS
No voltage at these
operations caused by a
broken wire or switch, or a
circuit breaker which doesn't
reset to its closed position.
Check the system for shorts,
grounds or defective electrical
components.
Circuit breaker remains
closed during an overload
condition or is illegally
bypassed with a jumper.
Important: Never jumper a
circuit breaker without
providing an equivalent
protective devise in the
jumper.
Remedy
Determine and repair cause of
short circuit.
Test park lock brake switch
for continuity and replace
switch if closed in the
disengaged position.
Replace bulbs.
Replace wiring and circuit
breaker as required.
Test switches for continuity
under the appropriate
conditions and replace as
required.
Check test switch for
continuity and replace switch
if closed in the released
position.
Determine and repair the
cause of the short circuit.
Test switches for continuity
under the appropriate
conditions and replace as
required.
Replace wiring, switch and
circuit breaker as required.
Repair or replace as required.
Correct the cause of the
overload and replace
damaged wiring, components
and circuit breaker
Model 6036 S/N 9B0499 and Before
Reference
See para. 10.8.4
See para. 10.7.4
See para. 10.8.4
See para. 10.4
See para. 10.8.5
thru 10.8.8
See para. 10.8.4
See para. 10.8.4
See para. 10.8.5
thru 10.8.8
See para. 10.4
See para. 10.4
See para. 10.4