TM-9-2350-311-34-1

HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS: HOWITZER, MEDIUM, SELF-PROPELLED, 155MM

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

SEPTEMBER 1994
TM-9-2350-311-34-1

  TM-9-2350-311-34-1 - Page 142 of 352

TM9-2350-311-34-1
7-3 CIRCUIT IDENTIFICATION AND ILLUSTRATION OF WIRING HARNESSES
(M109A4/M109A5)
LEGEND
1
2
3
4
5
6
7
8
9
10
11
NOTE
Electrical cables are marked with wire-numbered metal tags attached to junction of
the terminal of cable. All electrical circuits shown in schematics and wiring diagrams
are identified by wire numbers listed in each area.
Wiring harness 12268308 — Alternator to
rectifier
Wire 82— From master relay to wire 82/49
Wire 27B — From wiring harness 12268418 —
Engine instrumentation bulkhead connector to
powerplant connector bracket
wire 2 — From voltage regulator to wire 81
Lead 12268304 — From bulkhead connector to
slave start receptacle (wire 49) and to circuit
breaker panel (wire 10)
Wiring harness 12268308 — From bulkhead
connector to engine instrumentation
Wiring harness 10925829 — From accessory
control box to heater fuel pump and personnel
heater
Lead 12268419 — Bulkhead to override switch
lead
Wiring harness 12353400 — NATO slave start-
to-external power receptacle wiring harness
Wiring harness 12352794 — Ventilated
facepiece system wiring harness
Lead 12268304 — From circuit breaker to:
12 Slip ring segment board (47)
13 Telephone terminal (21 and 22)
14 Accessory control box (37 and 38)
15 Wiring harness 12260298— From driver’s
compartment/connector to portable instrument
panel
16 Wire7— Battery to ground
17 Wiring harness 12260287— Bulkhead
connector to driver’s compartment connector
bracket
18 Wiring harness 11594268— bulkhead
connector to driver's instrument panel
19 Wire 68— Battery positive-to-negative
connectors
20 Wiring harness 12353402— Driver’s bulkhead-
to- batteries wiring harness
21 Wire 81 — From batteries to master relay
22 Wiring harness 12268303— Rectifier-to-voltage
regulator
23 Wiring harness 12353401 — Engine disconnect
bracket- to-batteries lead assembly
24 Wiring harness 12268418— Engine
instrumentation bulkhead connector-to-
powerplant connector bracket
25 Wire 82— From bulkhead connector to engine
starter
26 Wiring harness 10921380— To headlight
assemblies
27 Wire 452— Bilge pump relay to bilge pump
28 Wire 29-31 — To fuel level transmitters
Wires 76— To
fuel
tank fuel pumps
29 Starter to engine electrical disconnect — Wiring
harness 12353072
7-6


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