TM 1-1740-221-13&P&P
FIELD MAINTENANCE
STOPLIGHT SWITCH
INITIAL SETUP:
Personnel Required
Test Equipment
91B, Light Wheel Vehicle Mechanic (2)
Multimeter (WP 0157, Item 14)
Tools and Special Tools
References
Chock Blocks (WP 0155, Item 25)
Floor Jack 5 Ton (WP 0157, Item 11)
General Mechanic Tool Box (WP 0157, Item 24)
Jack Stands 5 Ton (WP 0157, Item 12)
INSPECTION
Visually inspect for security and integrity of stoplight switch (Figure 1, Item 3) and electrical connectors. Access
to stoplight switch is under the front of the vehicle.
END OF TASK
TEST
STOPLIGHT SWITCH
1. Ohms test switch for continuity across switch terminals (Figure 1, Item 4). Switch should have no continuity
without brake application.
2. Ohms test switch for continuity across switch terminals (Figure 1, Item 4) with brake applied. Continuity
should be measured.
END OF TASK
REMOVAL
1. Lift vehicle front (WP 0029).
2. Disconnect battery negative cables (WP 0111).
3. Disconnect stoplight switch wires from switch terminals (Figure 1, Item 4).
4. Loosen jam nuts (Figure 1, Item 2). Remove forward jam nut (not shown).
5. Remove stoplight switch (Figure 1, Item 3).
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