TRANSMISSION OIL PRESSURE INDICATOR CIRCUIT. (Cont)

TM 9-2350-238-20-1

2-12. ELECTRICAL CIRCUIT TROUBLESHOOTING (CONT).

To access transmission and engine disconnect, remove hull transmission

Step 4.

compartment deck assembly. Refer to page 2-938. Disconnect lead 321

from transmission oil pressure transmitter. Place red probe in input

terminal of transmission oil pressure transmitter. Ground black probe.

Start engine and run at 1000 to 1200 rpm. If multimeter indicates 0 ohms

and does not increase, or increases to more than 9 ohms, stop engine and

replace transmission oil pressure transmitter. Refer to page 2-626. If

multimeter indicates 0 ohms and then increases 4 to 9 ohms, increase

engine rpm to 1800. Check resistance and stop engine. If multimeter

indicates 9 to 22 ohms, go to step 5. If multimeter indicates less than 9

ohms or more than 22 ohms, replace transmission oil pressure transmitter.

Refer to page 2-626. Connect lead 321 to transmission oil pressure

transmitter.

Step 5.

Disconnect wiring harness at engine disconnect. Place red probe on pin J

(lead 321) of plug. Ground black probe. Start engine and run at 1000 to

1200 rpm. Check resistance and stop engine. If multimeter indicates 4 to

9 ohms, go to step 6. If multimeter indicates less than 4 ohms or more

than 9 ohms, repair lead 321 between engine disconnect and transmission

oil pressure transmitter. Refer to page 2-371. Connect wiring harness at

engine disconnect.

2-160