TM 9-4110-255-14
4-52. ENGINE OIL PRESSURE SWITCH TESTING AND REPLACEMENT.
This task covers:
a. Testing
b. Removal
c. Installation
INITIAL SETUP
Materials/Parts:
Equipment Conditions:
Marker tag
Refrigeration unit shut down (para 2-7) and battery
4, Appendix E
disconnected (para 4-35).
Washer
Front door open.
13, Appendix G
a. Testing. (See Figure 1-4.)
(1) Pull cap (1) back to expose engine oil pressure switch (2) connector. Tag and disconnect wire lead (3).
(2) Using multimeter set to measure continuity, check engine oil pressure switch (2) continuity between
connector and base. Continuity should be indicated. If no continuity was indicated, replace engine oil
pressure switch.
(3) If no failure was indicated, connect wire lead (3) using tag and wiring diagram (fig. 1-4). Remove tag.
(4) Push cap (1) over engine oil pressure switch (2) connector.
b. Removal.
(1) Pull cap (1) back to expose engine oil pressure switch (2) connector. Tag and disconnect wire lead (3).
(2) Remove engine oil pressure switch (2) and washer (4). Discard washer.
Figure 4-46. Engine Oil Pressure Switch
4-125
