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 359 of 1275

CONTINUED FROM STEP B

1. Install B.O. marker assembly (para 8-22).

2. Remove headlight assembly (para 8-23).

3. Place red lead of multimeters in socket F (lead

20) and black lead to ground.

4. Turn MASTER switch ON, place main light

switch in B.O. MARKER position, and check

for voltage.

5. Turn MASTER and light switches OFF.

Is voltage present?

I

Repair or replace lead 20 of headlight

wiring harness (para 8-48).

D

1. Install headlight assembly (para 8-23)

2. Disconnect lead 20 of bulkhead-to-

headlights/bilge pump wiring harness from

headlight resilient mount wiring harness.

3. Place red lead of multimeters in lead 20 and

black lead to ground.

4. Turn MASTER switch ON, place main light

switch to B.O. MARKER position, and check

for voltage.

5. Turn MASTER and main light switches OFF.

Is voltage present?

Replace headlight resilient

mount (para 8-24).

I

CONTINUED ON NEXT PAGE

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TM 9-2350-311-20-1