JLG G12-55A Service Manual - Manual (Page 163)

9-21 G10-55A, G12-55A
Electrical System
9.11 DASH SWITCHES
9.11.1 Ignition Key Switch
Note: For information on the front windshield wiper, rear
window wiper and washer systems, refer to Section 9.7,
“Window Wiper/Washer Windshield Wiper Motor.”
a. Ignition Switch Removal
1. Park machine on a firm, level surface, level machine,
fully retract boom, lower boom, place transmission
control lever in (N) NEUTRAL, engage park brake
and shut engine OFF.
2. Place a Do Not Operate Tag on both ignition key
switch and steering wheel.
3. Open engine cover. Allow system fluids to cool.
4. Properly disconnect the batteries.
5. Remove the screws securing the dash panel (13).
6. Remove hex nut securing ignition key switch (14) 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 proper operation of ignition key switch, test
terminals on back of switch for continuity with ohmmeter.
Test ignition key switch for continuity, by checking from
BAT terminal (15) to each of 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 dash panel with previously used hardware.
4. Properly connect the batteries.
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.”
250
150 50
E F
1/2
1 3
2 4
P
P
MY7350
13
14
MY0830
BAT
B
AT
ACC
ACC
IGN
IGN
ST
15