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 392 of 1275

TM 9-2350-311 -20-1

3-3 TROUBLESHOOTING CHART —

CONTINUED

z.

PERSONNEL HEATER CIRCUIT — CONTINUED

(2) PERSONNEL HEATER INDICATOR LIGHT

FAILS TO OPERATE; PERSONNEL HEATER

OPERATES

.

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

Multimeters (item 36, Appx H)

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

Remove personnel HEATER indicator lamp.

A

2.

Place red lead of multimeters in center contact

.

and black lead to ground.

3. Turn MASTER switch ON, HEAT

SELECTOR switch to LOW and check for

voltage.

4. Turn MASTER and HEAT SELECTOR

switches OFF.

Is voltage present?

Replace HEATER indicator

lamp (para 8-20).

CONTINUED ON NEXT PAGE

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