JLG G12-55A Service Manual - Manual (Page 180)

Electrical System
9-38 G10-55A, G12-55A
b. Disassembly
DO NOT disassemble the gauge. The gauge is not
serviceable. Replace the gauge if found to be defective.
c. Gauge Installation and Testing
1. Install the gauge (12) in the dash. Install the gauge
bracket.
2. Connect the previously labeled wires to the gauge.
3. Install the dash panel with the previously used
hardware (11).
4. Properly connect the battery.
5. Turn the ignition to the ON position to check the
gauge values.
6. Close and secure the engine cover.
7. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
9.12 DASH SWITCHES
9.12.1 Ignition Key Switch
Note: For information on the front windshield wiper, rear
window wiper and washer systems, refer to Section 9.8,
“Window Wiper/Washer Windshield Wiper Motor.”
a. Ignition Switch Removal
1. Park the machine on a firm, level surface, level the
machine, fully retract the boom, lower the boom,
place the transmission control lever in
(N) NEUTRAL, engage the park brake and shut the
engine OFF.
2. Place a Do Not Operate Tag on both the ignition key
switch and the steering wheel, stating that the
machine should not be operated.
3. Open the engine cover. Allow the system fluids to
cool.
4. Properly disconnect the battery.
5. Remove the screws securing the dash panel.
6. Remove the hex nut securing the ignition key switch
to the dash.
7. Label and disconnect the ignition switch wires 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, test the terminals on the back of the switch for
continuity with an ohmmeter.
Test the ignition key switch for continuity, by checking
from the BAT terminal (13) to each of the remaining
terminals in their corresponding switch position.
If all terminals do not show proper continuity, replace the
ignition switch.
d. Ignition Switch Installation
1. Connect the ignition key switch to the previously
labeled wires.
2. Align the ignition switch in the dash 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.
3. Install the dash panel with the previously used
hardware.
4. Properly connect the battery.
5. Close and secure the engine cover.
6. Remove the Do Not Operate Tags from both the
ignition key switch and the steering wheel.
Note: If further information is needed, refer to Section
9.5, “Electrical System Schematics.”
MY0830
BAT
BA
T
AC
C
AC
C
IGN
IGN
ST
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