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 792 of 1313

FIELD MAINTENANCE

ALTERNATOR OVERCHARGING, BATTERY INDICATOR GAUGE IN RED POSITION

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.)

WP

0108

Volume 2, WP

0300

Volume 2, WP

0301

Volume 5, WP

0780

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

ALTERNATOR OVERCHARGING, BATTERY INDICATOR GAUGE IN RED POSITION

NOTE

Conduct these malfunction tests if the battery indicator gauge is in red position. This

procedure will check the alternator and the gauge circuitry.

TM 9-2320-272-23-1

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0091-1