JLG Skytrak 6036 Service Manual page 272

Section 10. Electrical System
Trouble
Optional Light Circuit—HEADLIGHT AND REAR WORK LIGHT SWITCH (cont'd)
All lights are
inoperative or
intermittent.
Windshield wiper
Inoperative.
10-78
Probable Cause
1. Tripped circuit breaker.
2. Loose connection.
3. Open wiring from light
switch to battery.
4. Short to ground in circuit
between light switch and
lights.
5. Defective light switch.
Windshield Washer/Wiper for Enclosed Cab—GENERAL
1. Turn ignition switch to RUN
and wiper switch clockwise
to HIGH SPEED. Ground a
12 Vdc test lamp and touch
probe to wiper or switch
terminal H.
2. If lamp lights, turn wiper
switch to LOW, leave
wiring connected to wiper
motor, and connect jumper
wire from motor to ground.
3. If lamp doesn't light, circuit
breaker (12, Fig. 10.5) may
be stuck in the open
position, it may be
oscillating between open
and closed due to a short
in the circuit, or it may be
in its normally closed
condition.
Remedy
Determine cause of overload
and reset circuit breaker.
Check and secure
connections at light switch.
Check red wire terminal at
light switch with test light; if
bulb doesn't light, repair open
wire circuit to battery.
If after a few minutes
operation, lights flicker ON
and OFF and a thumping
noise can be heard from the
circuit breaker, repair short to
ground between light switch
and headlights. After repairing
short, check for flickering
lights after one minute of
operation. If flickering occurs,
replace damaged circuit
breaker.
Check red and yellow wire
terminals at light switch with
test light. If bulb lights at red
wire terminal but not at yellow
terminal, replace light switch.
If lamp lights, continue with
step 2; if lamp doesn't light,
continue with step 3.
If wiper runs, repair open in
ground strap; if wiper doesn't
run, problem is in motor (refer
to paragraph 10.10.3).
If open, replace circuit
breaker. If oscillating, check
for high amperage draw due
to a short in wiring or motor. If
circuit breaker is closed,
repair open in line 32 between
circuit breaker and wiper
motor or repair or replace
wiper motor (33, Fig. 10.62).
Model 6036 S/N 9B0499 and Before
Reference
See para. 10.4
See para. 10.9.4
See para. 10.4
and 10.9.4
See para. 10.9.4
See para. 10.10.1
See para. 10.10.1
and 10.10.3
See para. 10.4