TM 5-3805-262-20
5-8. SENDING UNITS AND WARNING SWITCHES MAINTENANCE (CONT)
a. Engine Oil Pressure Switch (cont).
INSPECTION, TESTING, AND REPAIR
(1)
(2)
(3)
(4)
( 5)
Inspect wiring harness terminal (1) wire for cracked or broken insulation
or broken wire strands at connection to terminal. Repair cracked or bro -
ken insulation by applying insulation tape to area. If broken wire
strands are seen, cut wire as close to terminal as possible. Strip 1/4
inch insulation from end of wire taking care not to cut through wire then
crimp new terminal securely onto wire.
Inspect engine oil pressure switch (2) for cracks, breaks, damaged
t h r e a d s , d i s t o r t i o n, or other damage. Connect multimeter between switch
terminal and body and check for continuity. If continuity is not obtained
or any of the above conditions are seen , replace engine oil pressure
switch.
Inspect fuseholder (3) for cracks, breaks, distortion, or other damage.
Replace fuseholder by cutting wires as close to fuseholder halves as pos-
s i b l e , stripping 1/4 inch insulation from end of wires, then splicing new
fuseholder wires to existing wires using insulated crimp connectors.
Inspect resistor (4) for cracks, breaks, and discoloration due to over-
heating. Connect multimeter between ends of resistor. Multimeter should
indicate 36 to 44 ohms. Replace resistor if any of the above conditions
are observed or if proper multimeter indication is not obtained.
Inspect remaining parts for cracks, breaks, distortion, or damaged
t h r e a d s; replace as necessary.
INSTALLATION (SHEET 1 OF 2)
(1)
(2)
(3)
( 4)
At rear of engine block, below alternator,
i n s t a l l e n g i n e o i l p r e s s u re
switch (2) and tighten.
Install resistor (4) by pushing into long half of fuseholder (3).
Assemble fuseholder (3) halves by grasping both in your fingers, alining,
then firmly pushing them together and twisting clockwise.
Connect wiring harness spade terminal (1) to switch (2) spade terminal by
grasping in your fingers, alining, then firmly pushing onto switch termi-
n a l .
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