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 353 of 1275

TM 9-2350-311-20-1

(5) STOP LIGHT FAILS TO OPERATE; ALL OTHER

LIGHTS OPERATE

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

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

Multimeters (item 36, Appx H)

Taillight cover removed (para 8-25)

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

1. Remove stop light bulb (para 8-25).

2. Place red lead of multimeters in center contact

and black lead to ground.

3. Turn MASTER switch ON, place main light

switch to SER. DRIVE position, and check

for voltage.

4. Turn MASTER switch OFF.

Is voltage present?

Replace stop light bulb (para 8-25).

3.

4.

5.

6.

7.

Install stop light bulb in socket (para 8-25).

Disconnect two leads 75 from stop light

switch.

Place red lead of multimeters in first lead 75

and black lead to ground.

Turn MASTER switch ON and check for

voltage.

Place red lead of multimeters in second lead

75 and black lead to ground.

Check for voltage.

Turn MASTER switch OFF.

Is voltage present?

CONTINUED ON NEXT PAGE

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