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 382 of 1275

TM 9-2350-311

-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

y.

HI-BEAM INDICATOR LIGHT CIRCUIT —

HI-BEAM INDICATOR LIGHT FAILS TO OPERATE; ALL

CONTINUED

OTHER LIGHTS OPERATE

T

OO

I

S

General mechanic’s tool kit (item 64, Appx H)

Muitimeter (item 36, Appx H)

TA-1 probe kit (item 43, Appx H)

1. Remove inoperative HI-BEAM indicator

light bulb (para 8-17).

2. Place red lead of multimeters in center contact

of socket and black lead to ground.

3. Turn MASTER switch ON, place main light

switch in SER. DRIVE position, and check for

I

voltage.

4. Turn MASTER and main light switches OFF.

I

Is voltage present?

Replace HI-BEAM indicator light

bulb (para 8-17).

Driver's instrument panel released (para 8-17)

CONTINUED ON NEXT PAGE

3-282