FUEL HEAT SWITCH MAY BE DEFECTIVE

TM 9-4910-387-14-2

6-2.

TROUBLESHOOTING (cont)

FUEL HEAT SWITCH MAY BE DEFECTIVE. (cont)

2 Remove both leads. Connect one multimeter lead to FUEL HEAT

switch contact (3) and connect other lead to FUEL HEAT switch contact

(4).

3 Check for continuity. If continuity does not exist, replace FUEL HEAT

4 If FUEL HEAT light does not light, proceed to step C.

THERMOSTAT FOR FUEL TANK ASSEMBLY MAY BE DEFECTIVE

NOTE

For a quick resistance check of thermostat, go from

pins Y and Z of male connector plug.

1 Remove box cover from fuel tank assembly (p 6-409).

2 Connect one multimeter lead to tank heater contact Y

(1) and connect other lead to tank heater contact Z (2).

3 Resistance of 40 ohms should be indicated.

resistance is not indicated, replace the tank heater

thermostat (p 6-409).

4 Heater element inside of fuel tank assembly must be

visually inspected. See figure 41 of TM 9-4910-387-

24P.

5 If FUEL HEAT light does not light, proceed to step D.

6-50

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