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 293 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP D

1. Reconnect bulkhead-to-engine disconnect

2.

3.

4.

5.

bracket wiring harness to engine disconnect

bracket.

Disconnect lead 352A from aeration

detector.

Place jumper wire from lead 352A to

ground.

Turn MASTER switch ON and press

COOLANT indicator light.

Turn MASTER switch OFF.

Does COOLANT indicator light operate?

I

I

Repair or replace lead 352A of powerplant

wiring harness (para 8-43, M109A2/

M109A3; 8-44, M109A4/M109A5).

1

Replace aeration detector (para 8-16).

CONTINUED FROM STEP A

1. Reconnect lead 352A to COOLANT indicator

‘ 2.

3.

4.

5.

light.

Disconnect lead 27 from COOLANT

indicator light.

Place red lead of multimeter in lead 27 and

black lead to ground.

Turn MASTER switch ON and check for

voltage.

Turn MASTER switch OFF.

I

S

voltage present?

I

Replace COOLANT indicator light

(para 8-17).

CONTINUED ON NEXT PAGE

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