TM-9-2320-272-23-1

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; FIELD MAINTENANCE MANUAL; VOLUME 1 OF 5

SEPTEMBER 2012

TM-9-2320-272-23-1 - Page 904 of 1313

FIELD MAINTENANCE

FUEL GAUGE INOPERATIVE

INITIAL SETUP:

Tools and Special Tools

Tool Kit, General Mechanic's: Automotive

(Volume 5, WP

0826, Table 1, Item 56)

Multimeter

(Volume 5, WP

0826, Table 1, Item 34)

Test Set, Electronic Systems

(Volume 5, WP

0826, Table 1, Item 51)

Personnel Required

(2)

References

Point to Point Schematics

References (cont.)

Volume 2, WP

0310

Volume 2, WP

0312

Volume 2, WP

0314

Volume 2, WP

0332

Volume 3, WP

0351

Volume 3, WP

0352

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

FUEL GAUGE INOPERATIVE

WARNING

Do not perform testing near fuel tank with fill cap or sending unit removed. Fuel may ignite.

Failure to comply may result in injury or death to personnel.

NOTE

Conduct these malfunction tests if fuel gauge is inoperative. This procedure will check for a

faulty sending unit, faulty circuit 28 or 29 wire, defective gauge or instrument cluster wiring

assembly.

TM 9-2320-272-23-1

0107

0107-1