WARNING SWITCH CIRCUIT. (Cont) - TM-9-2350-238-20-10215

TM 9-2350-238-20-1

Step 1.

Start engine and run at 1000 to 1200 rpm. Note pressure reading on

ENGINE OIL PRESS indicator and stop engine. If ENGINE OIL PRESS

indicator reads at or near 0 psi (0 kPa), go to step 2. If ENGINE OIL

PRESS indicator reads about 40 psi (276 kPa), go to step 5.

To access engine oil low-pressure warning switch, open fuel filter access

Step 2.

door. Set MASTER switch OFF. Place red probe on engine oil low-

pressure warning switch metal case. Ground black probe. If multimeter

indicates resistance, go to step 3. If multimeter indicates infinity, clean

surface area between engine oil low-pressure warning switch and engine

for a good metal-to-metal contact.

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