TM 1-1740-221-13&P&P
FIELD MAINTENANCE
COOLANT TEMPERATURE SENDING UNIT (GAUGE)
INITIAL SETUP:
Personnel Required
Test Equipment
91B, Light Wheel Vehicle Mechanic
Multimeter (WP 0157, Item 14)
References
Tools and Special Tools
General Mechanic Tool Box (WP 0157, Item 24)
Materials/Parts
Equipment Condition
Anti-Seize,Tape (WP 0156, Item 50)
Engine Shut Down and Cool
INSPECTION
Visually inspect temperature switch for mount security, leaks, wiring for security and corrosion or any damage
affecting serviceability.
END OF TASK
TEST
Temperature Sender Continuity Test
1. Disconnect battery chassis negative cable (WP 0111).
2. Remove nut (Figure 1, Item 4).
3. Remove wire from temperature sending unit.
4. Ohms test from terminal nut (Figure 1, Item 4) to ground.
NOTE
Resistance measured is dependent on temperature.
5.
Resistance measured reads 2k ohms nominally at 60 F.
6.
Replace temperature sending unit if resistance reads ininity (no continuity is measured).
END OF TASK
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