JLG Skytrak 6036 Service Manual page 265

Trouble
Discharged
batteries.
Key binds in
ignition switch
lock.
Key cannot enter
ignition switch or
cannot be turned
inside lock.
Ignition switch
fails to function in
one or more
positions.
Ignition switch
doesn't crank
engine in START
position.
Model 6036 S/N 9B0499 and Before
Probable Cause
Charging System—BATTERIES (cont'd)
1. Short circuit in battery cell
or cells.
2. Loose or dirty battery cable
connections.
3. Dirty battery top.
4. Low output or no output
from alternator.
5. High resistance in the
positive battery cable.
6. High resistance in the
negative battery cable.
Switches and Solenoids—IGNITION (KEY) SWITCH
Sticky, painted or bent key.
Moisture within ignition switch
is frozen.
1. Loose or broken wiring or
circuit breaker (10, Fig.
10.5) doesn't reset and
remains open.
2. Trouble in the starting
circuit.
3. Trouble in the THERMO
START circuit.
4. Defective ignition switch.
Travel select lever is in
FORWARD or REVERSE.
Remedy
Refer to paragraph 10.6.2.d
and perform battery load test.
Clean the clamp on the
battery cables and the battery
posts.
Refer to paragraph 10.6.2.i
and clean the top of the
battery.
Refer to paragraph 10.6.1 and
test alternator.
Refer to paragraph 10.6.2 and
check the positive battery
cable (Test No. 3 ).
Refer to paragraph 10.6.2 and
check the negative battery
cable (Test No. 5 ).
Clean, remove paint and
straighten, remove any burrs
from surface of key and
sprinkle powdered graphite on
working surfaces of key as
described in paragraph 10.7.1
IMPORTANT: Use only
graphite or a liquid lock deicer
within the lock. Severe lock
malfunctions may require the
services of a locksmith.
Warm the ignition switch
using a hair dryer or use a
liquid lock deicer to lower the
freezing point and evaporate
the moisture within the lock.
Replace wiring and circuit
breaker.
Refer to starting circuit
troubleshooting.
Refer to Thermo Start plug
troubleshooting.
Repair or replace ignition
switch.
Move travel select lever to
NEUTRAL position.
Section 10. Electrical System
Reference
See para. 10.6.2.d
See para. 10.6.2.i
See para. 10.6.2.i
See para. 10.6.1
See para. 10.6.2
and 10.5.2.d
See para. 10.6.2
and 10.5.2.f
See para. 10.7.1
See para. 10.7.1
See para. 10.7.1
See para. 10.7.1
See para. 4.2.2
10-71