JLG G5-18A Service Manual - Manual (Page 142)

Electrical System
9-22 G5-18A, 2505H, 25.5
c. Installation and Testing
1. Check that the variable speed fan control is in the
OFF position.
2. If installing the temperature control, attach the cable
connector to the back of the control.
3. Insert the control shaft through the panel, ensuring
that the knob is in the VERTICAL position.
4. Install the hex locknut on the shaft and tighten.
5. Connect the cab harness connector to the variable
speed fan control.
6. Install the control panel screws.
7. Install the setscrew, securing the knob to the control.
8. Properly connect the battery.
9. Turn the ignition key switch to the RUN position and
fan switch. Verify that the fan operates at variable
speeds.
10. Close and secure the battery and engine covers.
11. Remove the Do Not Operate Tags from both the
ignition key and the steering wheel.
9.10 SWITCHES, SOLENOIDS AND
SENDERS
9.10.1 Ignition Key Switch
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 battery and engine covers. Allow the
engine to cool.
4. Properly disconnect the battery.
5. Remove lower dash panel.
6. Remove the hex nut securing the ignition key switch
to the dash.
7. Reach up under the dash to work the ignition switch
and wiring out of the mounting hole.
8. 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, 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 BAT terminal (1) to each of the remaining
terminals in their corresponding switch position.
If all terminals do not show proper continuity, replace the
ignition switch.
MY2340
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