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 777 of 1275
TM 9-2350-311 -20-1
8-52 ACCESSORY CONTROL BOX-TO-HEATER/BLOWER WIRING HARNESS
This task covers:
a. Removal
b. Disassembly/Repair
c. Assembly
d. Installation
INITIAL SETU P
T
OO
I
S
General mechanic’s tool kit (item 64, Appx H)
Electrical tape — black (item 62, Appx D)
Batteries disconnected (para 8-28)
Portable instrument panel removed (para 8-17)
Connector
Wire
No.
Electrical Lead To:
No.
1
2
3
4
5
6
7
8
9
Panel lights
Personnel heater power circuit
Air cleaner blower motor relay
Personnel heater ignition circuit
Personnel heater preheat resistor circuit
Personnel heater fuel control valve circuit
Personnel heater fuel pump circuit
Personnel vent fan
Personnel vent fan
40
400
415
405
407
401
402
159A
159B
Connector
Wire
No.
Electrical Lead To:
No.
10
11
12
13
14
15
16
17
18
Personnel vent fan
159C
Personnel vent fan
GND
Personnel heater fuel pump
402A
Ground
GND
Connector accessory control box
Connector accessory control box
Connector personnel vent fan
Connector personnel heater
Air cleaner blower motor
415
8-132
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