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 365 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP C

1. Install headlight assembly (para 8-23).

2. Disconnect lead 19 of bulkhead-to-

headlights/bilge pump wiring harness from

headlight resilient mount wiring harness.

3. Place red lead of multimeters in lead 19 and

black lead to ground.

4. Turn MASTER switch ON, place main light

switch to B.O. DRIVE position, and check for

voltage.

5. Turn MASTER and main light switches OFF.

Is voltage present?

Replace headlight resilient mount

I

wiring harness (para 8-24).

I

E

1. Reconnect lead 19 of bulkhead-to-

2.

3.

4.

5.

6.

headlights/bilge pump wiring harness to

headlight resilient mount wiring harness.

Disconnect bulkhead-to-driver’s instrument

panel wiring harness from driver’s bulkhead.

Place a jumper wire from pin H to socket H

(lead 459).

Place red lead of multimeters in socket F (lead

19) and black lead to ground.

Turn MASTER switch ON, place main light

switch to B.O. DRIVE position, and check for

voltage.

Turn MASTER and main light switches OFF.

Is voltage present?

bulkhead-to-headlights/bilge pump

Repair or replace lead 20/24 of

bulkhead-to-driver’s instrument panel

wiring harness (para 8-50).

END OF TASK

3-265

wiring harness (para 8-47).