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 752 of 1313

FIELD MAINTENANCE

STARTER MOTOR INOPERATIVE; NO SOLENOID THUMP

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

WP

0084

References (cont.)

Volume 2, WP

0300

Volume 2, WP

0301

Volume 2, WP

0307

Volume 2, WP

0319

Volume 2, WP

0346

Volume 3, WP

0352

Volume 3, WP

0366

Volume 5, WP

0780

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

STARTER MOTOR INOPERATIVE; NO SOLENOID THUMP

NOTE

Conduct these malfunction tests if the starter motor is inoperative and there is no solenoid

thump. This procedure will check for faulty wires 81A/81, 459, 81, 74, 5A/5B, 498, 499, and

566. It will also check for a faulty alternator, battery switch, start switch, neutral start switch,

and protective control box.

TM 9-2320-272-23-1

0088

0088-1