TM-9-2350-311-20-2

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR CAB, ARMAMENT, SIGHTING AND FIRE CONTROL, ELEVATING AND TRAVERSING SYSTEMS AND ASSOCIATED COMPONENTS

DECEMBER 1993

TM-9-2350-311-20-2 - Page 438 of 828

TM 9–2350–311–20–2

8–14

8–2

GUNNER’S SELECTOR SWITCH BOX WIRING HARNESS — CONTINUED

a.

Removal — Continued

4

Remove three cap screws (7), three flat washers (8), three plastic attaching straps (9), and three lock-

washers (10) securing gunner’s selector switch box wiring harness (11) to vehicle. Discard lockwashers.

b.

Disassembly/Assembly

See repair procedures for harnesses, plugs, and terminals (para 8–1).

c.

Testing

Using multimeter, test gunner’s selector switch box wiring harness for continuity through all plugs and con-

nectors.

d.

Installation

1

Secure gunner’s selector switch box wiring harness (11) to vehicle using three new lockwashers (10), three

plastic attaching straps (9), three flat washers (8), and three cap screws (7).

2

Connect connector (5), wire 625/645, at quick-disconnect from gunner’s selector switch box assembly (6).

3

Connect connector (3), wire 645, at quick-disconnect from pressure switch (4).

4

Connect connector (1), wire 625A, to power pack solenoid (2)

7

8

9

10

11