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 221 of 1275

TM 9-2350-311-20-1

(1) GLOW PLUG WAIT LIGHT FAILS TO OPERATE;

GLOW PLUG SYSTEM OPERATES USING MANUAL

OVERRIDE

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

Two

Multimeters (item 36, Appx H)

TA-1 probe kit (item 43, App

X

H)

(Long test leads may be needed for some tests;

Transmission access door open (TM 9-2350-311-10)

16 AWG wire may be used as an extension.)

Air intake grille open (TM 9-2350-311-10)

1. Remove inoperative LED (para 8-17).

2. Place red lead of multimeters in center contact

of socket and black lead to ground.

3. Turn MASTER and GLOW PLUGS switches

ON and check for voltage.

4. Turn MASTER and GLOW PLUGS switches

OFF.

Is voltage present?

Replace LED (para 8-17).

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