TM-9-2320-272-24-2

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

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4

JUNE 1998

TM-9-2320-272-24-2 - Page 314 of 991

TM 9-2320-272-24-2

3-376. SIDE AND REAR DOOR BLACKOUT LIGHT SWITCH MAINTENANCE

THIS TASK COVERS:

a. Removal

b. Installation

c. Adjustment

APPLICABLE MODEL

REFERENCES (TM)

M934/A1/A2

TM 9-2320-272-10

TOOLS

TM 9-2320-272-24P

General mechanic’s tool kit (Appendix E, Item 1)

EQUIPMENT CONDITION

MATERIALS/PARTS

Parking brake set (TM 9-2320-272-10)

Main power switch off (TM 9-2320-272-10).

Solder (Appendix C, Item 70)

Van body side panel fully expanded and secured

(TM 9-2320-272-10).

1.

Remove two screws (4) and blackout light switch (2) from electrical panel (8) or switch box (1).

2.

Remove solder from terminals of blackout light switch (2) and disconnect two wires (7).

1.

Connect two wires (7) to terminals of blackout light switch (2) and install with solder.

2.

Install blackout light switch (2) on electrical panel (8) or switch box (1) with two screws (4).

1.

Remove blackout light switch (2) (task a.).

2.

Remove nut (5) and plate (6) from blackout light switch (2).

3.

Rotate ring (3) down farther on threaded shaft of blackout light switch (2).

4.

Install plate (6) on blackout light switch (2) with nut (5).

5.

Install blackout light switch (2) (task b.).

NOTE

With main power switch, interior lights, and blackout light circuit

on, interior lights must turn off when door starts to open, and turn

on when door is closed.

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