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 340 of 1275

TM 9-2350-311 -20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

t.

DOME LIGHT CIRCUIT— CONTINUED

DOME LIGHT FAILS TO OPERATE; ALL OTHER LIGHTS

OPERATE

Tools

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

Multimeters (item 36, Appx H)

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

NOTE

Move dome light switch to both positions. If dome light

comes on in one position only, go to step F.

Disconnect lead 38 from dome light.

2. Place red lead of multimeters in lead 38 and

black lead to ground.

3. Turn MASTER switch ON and check for

voltage.

4. Turn MASTER switch OFF.

I

Is voltage present?

Go to step D.

CONTINUED ON NEXT PAGE

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