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 391 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP I

J

1. Repair or replace both leads 402 of

accessory control box wiring harness (para

8-53).

2. Reassemble and install accessory control

box (para 8-20).

3. Turn MASTER switch ON, HEAT

SELECTOR switch to LOW and check

personnel heater for operation.

4. Turn MASTER and HEAT SELECTOR

switches OFF.

If personnel heater still does not operate, replace

personnel heater (para 11-20).

CONTINUED FROM STEP D

1.

2.

3.

4.

Reconnect accessory control box to heater/

blower wiring harness to accessory control

box.

Disconnect lead 402A from personnel heater

fuel pump.

Place red lead of multimeters in lead 402A and

black lead to ground.

Turn MASTER switch ON, HEAT SELECTOR

switch to LOW and check for voltage.

5. Turn MASTER and HEAT SELECTOR

switches OFF.

Is voltage present?

Repair or replace lead 402 of

accessory control box-to-heater/blower

wiring harness (para 8-52).

Replace personnel heater fuel pump

(para 11 -23).

I

NOTE

If personnel heater still does not operate, replace

personnel heater (para 11-20).

END OF TASK

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