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 377 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP A

F

1. Install inoperative panel light bulb

(para 8-1 7).

2. Disconnect bulkhead-to-driver’s instrument

panel wiring harness from main light switch.

3. Place a jumper wire from socket F (lead 15)

to socket B (lead 40).

4. Turn MASTER and instrument panel light

switches ON and check all instrument panel

lights for operation.

5. Turn MASTER and instrument panel light

switches OFF.

I

Do all panel lights operate?

Replace light switch (para 8-17).

I

1. Reconnect bulkhead-to-driver’s instrument

panel wiring harness to light switch.

2. Disconnect lead 40 of bulkhead-to-driver’s

instrument panel wiring harness form “Y”

connector.

3. Place red lead of multimeters in lead 40 and

black lead to ground.

4. Turn MASTER and instrument panel light

switches ON and check for voltage.

5. Turn MASTER and instrument panel light

switches OFF.

Is voltage present?

I

Replace “Y” connector (para 8-52).

Repair or replace lead 40 of bulkhead-to-

driver’s instrument panel wiring harness

(para 8-50).

END OF TASK

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