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 - Page 140 of 352
TM9-2350-311-34-1
7-1 POWERPLANT AND HULL WIRING HARNESS LISTING — CONTINUED
Circuit/
Wire No.
Circuit Name:
520
Not used
588
Circuit breaker-to-fuel pump primer switch power lead
588L
Not used
L1 and L2
Telephone circuit leads
588
Not used
7-2 CIRCUIT IDENTIFICATION AND ILLUSTRATION OF WIRING HARNESSES
(M109A2/M109A3)
NOTE
Electrical cables are marked with wire-numbered metal tags attached to junction of
the terminal of cable. All electrical ciruits shown in schematics and wiring diagrams
are identified by wire numbers listed in each area.
LEGEND
1
2
3
4
5
6
7
8
12
13
14
Wiring harness 12268102— Alternator-to-
rectifier
Wire 82— From master relay to wire 82/49
Wire 27B — From wiring harness 12268100 to
voltage regulator
Wire 2 — From voltage regulator to wire 81
Lead 11593784 or 12260266— From bulkhead
connector to slave start receptacle (wire 49) and
to circuit breaker panel (wire 10)
Wiring harness 10925829 — From accessory
control box to air cleaner
blower
assembly
Wiring harness 10925829 — From accessory
control box to heater fuel pump and personnel
heater
Lead 11593784 or 12260266— From circuit
breaker to:
9 Slip ring segment board (47)
10 Telephone terminal (21 and 22)
11 Accessory control box (37 and 38)
Wiring harness 12260298 — From driver’s
compartment/connector to portable instrument
panel
Wire 7 — Battery to ground
Wiring harness 12260287 — Bulkhead
connector to driver's compartment connector
bracket
15
16
17
18
19
20
21
22
23
24
25
26
27
Wiring harness 11594268 — Bulkhead
connector-to-driver's instrument panel
Wire 68 — Battery positive-to-negative
connectors
Wire 81 — From batteries to master relay
Wiring harness 11593806 — Rectifier-to-voltage
regulator
Wire 82/49 — Engine starter from lower
powerplant connector bracket to bulkhead
connector
Wiring harness 12268100— Engine
instrumentation bulkhead connector-to-
powerplant connector bracket
Ground wire — Powerplant to hull
Wiring harness 12268102 — From bulkhead
connector to engine instrumentation
Wire 82 — From bulkhead connector to engine
starter
Wiring harness 10921380 — To headlight
assemblies
Wire 452 — Bilge pump relay to bilge pump
Wire 29-31 — To fuel level transmitters
Wires 76— To fuel tank fuel pumps
Wire 352A and 352B — From wiring harness
12268102 to aeration detector
7-4
Back to Top
