FUEL INDICATOR DOES NOT LIGHT.

TM 3-1040-279-12&P

TROUBLESHOOTING (CONT)

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2. Check fuel pump operation.

CAUTION

Do not hold FUEL switch in START position for more than 30

seconds.

Hold FUEL switch in START position and listen for pump operation at smoke generator.

If fuel pump is operating, set FUEL and POWER switches to OFF and replace fuel

pressure switch S108 (P. 4-98).

If fuel pump is not operating, set FUEL switch to RUN and go to next step.

Step 3. Check control panel circuit.

Disconnect cable assembly from connector 5J1 at smoke generator.

Check for continuity between pins C and F at cable connector.

If continuity is obtained, reconnect cable assembly and go to next step.

If continuity is not obtained, reconnect cable assembly and go to step 6.

Step 4.

Check smoke generator circuit.

Disconnect cable assembly from connector 5J2 at smoke generator. Refer to P. 4-79 for

location.

Check for continuity between pins C and D of connector 5J2.

If continuity is obtained, reconnect cable assembly and go to next step.

If continuity is not obtained, replace high temp thermal switch TS101 (P. 4-105) or cable

assembly 5J2 (P. 4-65).

Step 5. Check relay K101 in container assembly. Refer to P. 4-78 for location.

Check for 28v between terminal A2 (+) of relay and terminal 16 of terminal board TB12 with

FUEL switch in START position.

If 28v is obtained, set all switches to OFF and replace pump motor assembly (P. 4-36).

If 28v is not obtained, set all switches to OFF and replace relay K101 (P. 4-67).

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