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TM 5-4210-220-12
4-24 ELECTRICAL SYSTEM - Continued
4-24.6 Instrument Control Panel Switches.
This task covers
Replacement
TOOLS
Tool Kit, General Mechanic, Automotive,
NSN 5180-00-177-7033
EQUIPMENT CONDITION
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
MATERIALS/PARTS
7769 Dimmer Switch
551840 Switch SPST
551842 Switch SPDT
551846 Switch DPDT
68362 Panel Lamp Switch
2484-16 Ignition Switch
90030 Start Pushbutton
229635TW-N Air Switch, Air Panel
41T-D3 Air Switch, Fold-down panel
8201K6 Pump Switch
8499K1 Pump Switch Guard
7124 Headlight Switch
NOTE
All cab switches are similar. Similar switches are grouped together in the following instructions to simplify
the manual.
REPLACEMENT
a.
Dimmer Switch Replacement
(1)
Remove screws (1).
(2)
Tag and remove wires 62, 63, and 64.
(3)
Remove switch (2) and discard.
(4)
Connect wires as marked to new switch.
(5)
Install switch in plate, aline mounting
holes. Tighten screws (1) firmly.
b.
Air Switch (Air Panel) Replacement.
NOTE
These
switches
are
used
to
operate
the
4-Wheel
Drive,
Differential Lock, and Fan.
(1)
Drain all four truck air tanks.
(2)
Remove air panel as detailed in para. 4-
24.4 paragraph b.
(3)
Tag and disconnect both air lines from
valve.
4-432
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