FOG OIL INDICATOR DOES NOT LIGHT (CONT)

TM 3-1040-279-12&P

TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 4.

Check vehicle cable.

Disconnect cable assembly from connector 6J3 on fog oil pump assembly.

Set FOG OIL switch to RUN.

Check for 28v between sockets A (+) and B (-) of cable connector for No. 1 generator on

sockets C (+) and D (-) for No. 2 generator.

If 28v is obtained, set FOG OIL switch to OFF, reconnect cable assembly to 6 J3, and go

to next step.

If 28v is not obtained, vehicle cable assembly is defective. Set all switches to OFF. Refer

to TM 9-2350-261-20-1 for equipment mounted on M1059 vehicles or TM 3-1040-280-

20&P for equipment mounted on M1037/M1097 vehicles.

Step 5.

Check fog oil pump pressure (P. 4-145).

If correct pressure is obtained, replace fog oil pressure switch S103 (P. 4-98).

If correct pressure is not obtained, check pump gears for free movement, pitting, or corrosion

Recheck pump pressure to ensure pump is running.

If no pump pressure is obtained, replace fog oil pump (P. 4-134).

Step 6.

Check smoke generator wiring.

Disconnect cable assembly from connector 5J1 at smoke generator.

Check continuity between pins A and B of connector 5J1.

If continuity was obtained, set OIL switch S113 in equipment container to OFF and go to

next step.

If continuity was not obtained, repair smoke generator wiring (P. 4-34).

Step 7.

Check control panel wiring.

Disconnect cable assembly from connector 1J3 or 1J4 (No. 1 or No. 2 smoke generator).

Connect a jumper wire between sockets A and B of connector 1J3 or 1J4.

Set POWER switch to ON and check that FOG OIL indicator lights.

If FOG OIL indicator lights, vehicle cable assembly is defective. Set POWER switch to

OFF, remove jumper. Refer to TM 9-2350-261-20-1 for equipment mounted on M1059

vehicles or TM 3-1040-280-20&P for equipment mounted on M1037/M1097 vehicles.

If FOG OIL indicator does not light, set POWER switch to OFF, remove jumper and

repair control panel wiring (P. 4-127).

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