TM-9-2350-311-20-1
HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5
TECHNICAL MANUAL; UNIT MAINTENANCE MANUAL FOR HULL, POWERPLANT, DRIVE CONTROLS, TRACKS, SUSPENSION, AND ASSOCIATED COMPONENTS
AUGUST 1994
TM-9-2350-311-20-1 - Page 759 of 1275
TM 9-2350-311 -20-1
8-45 ENGINE DISCONNECT BRACKET-TO-BULKHEAD WIRING HARNESS (M109A2/
M109A3)
This task covers:
a. Disassembly/Repair
b. Assembly
M109A2/M109A3
Electrical tape — black (item 62, Appx D)
Tools
General mechanic’s tool kit (item 64, Appx H)
Batteries disconnected (para 8-28)
NOTE
•
For removal and installation of the engine disconnect bracket-to-bulkhead wiring
harness, notify support maintenance.
Ž
On vehicles with engine model 7083-7396, connectors 4 and 11 are used for the
flame heater system. On vehicles with engine model 7083-7391, connectors 4 and
11 are used for the glow plug controller system.
Connector
Wire
No.
Electrical Lead To:
No.
1
2
3
4
5
6
7
8
9
10
11
Battery assembly to master relay
Aeration detector-to-coolant indicator
Aeration detector-to-coolant indicator
Flame heater-to-flame heater switch
(engine model 7083-7396) or glow plug
controller-to-glow plug lamp (engine model
7083-7391)
Engine oil pressure transmitter-to-engine
oil pressure gage switch
Engine coolant temperature transmitter-
to-engine water temperature gage
Transmission oil temperature transmitter-to-
transmission oil temperature gage
Transmission oil pressure transmitter-to-
transmission oil pressure switch
High/low temperature and pressure
switches/transmitters-to-master warning
light
Not used
Flame heater motor pump-to-flame heater
switch (engine model 7083-7396) or glow
plug controller-to-glow plug switch
(engine model 7083-7391 )
8-114
81
352B
352A
486A
36
33A
324
321
509
588
486
Connector
Wire
No.
Electrical Lead To:
No.
12
13
14
15
16
17
18
19
20
21
22
23
24
25
In-tank fuel pumps and generator
system relay
76B
Regulator cutoff relay coil energizer
27B
Air cleaner blower motor circuit
415
Master switch voltage regulator lead
400-459B
Engine starter circuit (starter relay bilge
pump circuit breaker neutral safety
switch)
14/14B
Voltage regulator-to-master relay lead
2
Ground wire
3
Engine bracket disconnect connector
Voltage regulator connector
Starter relay connector
Bilge pump circuit breaker lead
Driver’s bulkhead connector
Battery connectors
Master relay connectors
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