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 751 of 1275

TM 9-2350-311 -20-1

8-43 POWERPLANT WIRING HARNESS (M109A2/M109A3) — CONTINUED

a. Removal

WARNIN G

Ensure MASTER switch is OFF when working on hull electrical system to avoid

electrical shocks and bums.

1 Disconnect five connectors (18 thru 22).

NOTE

•

On vehicles with engine model 7083-7396, connectors 14, 15, and 16 are part of

connector 22 and are used for the flame heater system. On vehicles with engine

model 7083-7391, connectors 14, 15, and 16 are part of connector 22 and are

used for the glow plug controller system.

Ž

Access to wires 10 thru 12 will be through driver’s compartment.

Ž

Powerplant must be removed to remove starter leads (9 and 13) (para 4-5).

2 Disconnect 11 connectors (1 thru 8 and 10 thru 12).

3 Remove two nuts (23) and two flat washers (24). Remove two leads (9 and 13) at starter solenoid (25).

4 Remove two screws (26), two clamps (27), two screws (28), and two clamps (29). Place four screws back into

engine.

5 Remove powerplant wiring harness.

b. Disassembly/Repair

1 Remove electrical tape where necessary for disassembly.

2 Isolate and separate wiring harness branches.

3 Disassemble wiring branch (para 2-13) of wires to be replaced.

c. Assembly

1 Assemble wiring branch (para 2-13) of wires replaced.

2 Apply electrical tape as necessary for assembly.

8-105