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 818 of 1313

FIELD MAINTENANCE

STOPLIGHT INOPERATIVE (SERVICE OR BLACKOUT)

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

0315

Volume 2, WP

0327

Volume 2, WP

0335

Volume 3, WP

0352

Equipment Condition

Vehicle parked and engine shut down.

(TM

9-2320-272-10)

TROUBLESHOOTING PROCEDURE

STOPLIGHT INOPERATIVE (SERVICE OR BLACKOUT)

NOTE

Conduct these malfunction tests if stoplight is inoperative. This procedure will check for

battery voltage at stoplight switch, defective bulb, faulty wiring, damaged contacts, faulty

stoplight switch, and faulty main lighting switch.

TM 9-2320-272-23-1

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