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 768 of 1313

FIELD MAINTENANCE

NO OR LOW ALTERNATOR OUTPUT

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

0296

Volume 2, WP

0297

Volume 2, WP

0300

Volume 2, WP

0301

Volume 2, WP

0302

Volume 2, WP

0346

Volume 3, WP

0352

Volume 5, WP

0780

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

NO OR LOW ALTERNATOR OUTPUT

NOTE

Conduct these malfunction tests if there is no or low output from the alternator. This procedure

will check the alternator belts, alternator, wire 568, and wire 5.

TM 9-2320-272-23-1

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