JLG 4017 Service Manual - Manual (Page 148)

Electrical System
9.28 4017
9.13 JOYSTICK
Note: For information on the removal and replacement
of the joystick, refer to Section 4.3.4, “Joystick
Assembly.”
9.14 DASH SWITCHES
Note: For information on the front windshield wiper, rear
window wiper and washer systems, refer to Section 9.9,
“Window Wiper/Washer Windshield Wiper Motor.”
9.14.1 Ignition Key Switch
a. Ignition Switch Removal
1. Open engine cover. Allow engine to cool.
2. Disconnect the negative (-) battery cable at the
negative (-) battery terminal.
3. Remove lower access panel.
4. Remove the hex nut securing the ignition key switch
to the dash.
5. Reach up and under the dash to work the ignition
switch and wiring out of the mounting hole.
6. Disconnect the ignition switch connectors from the
cab harness connectors, and remove the switch
from the machine.
b. Disassembly
DO NOT disassemble the ignition switch. Replace a
defective switch with a new part.
c. Inspection and Replacement
To determine the proper operation of the ignition key
switch, using the following charts, test the wires on the
back of the switch for continuity with an ohmmeter.
Test the ignition key switch for continuity, by checking
from the ignition (#30) wire to each of the following wires
in each switch position. Continuity (X) should be present
as indicated in the following chart:
Test the ignition key switch for continuity, by checking
from the ignition (#30) wire to each of the following wires
in each switch position. Continuity (X) should be present
as indicated in the following chart:
If all wires do not show proper continuity, replace the
ignition switch.
d. Ignition Switch Installation
1. Connect the ignition key switch to the cab harness
connectors.
2. Reach up and under the dash to work the ignition
switch into the ignition switch-mounting hole on the
lower right side of the dash.
3. Align the ignition switch so that when it is in the OFF
position, the key slot is positioned vertically (straight up
and down). Install the hex nut securing the ignition
switch to the dash. DO NOT overtighten.
4. Install the lower access panel.
5. Connect the negative (-) battery cable to the negative
(-) battery terminal.
6. Close and secure engine cover.
Note: If further information is needed, refer to Section
9.5, “Electrical System Schematics.”
9.14.2 Dash Switches
a. Switch Removal
1. Open engine cover. Allow engine to cool.
2. Disconnect the negative (-) battery cable at the
negative (-) battery terminal.
3. There are three frames with three switches in each
frame.
4. Pull the frame out of the dash, disconnect the
harness connector to the switch in question and
push the switch out of the frame.
b. Disassembly
DO NOT disassemble the dash switch. Replace a
defective switch with a new part.
c. Inspection and Replacement
Inspect the switch terminals for continuity in both the
engaged and disengaged positions. Replace a defective
or faulty switch with a new switch.
Switch Position
Test from #30 wire to: OFF RUN START
Wire #50 X
Switch Position
Test from #30 wire to: OFF RUN START
Wire #15 X X
Wire #50 X