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 259 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP C

1. Reconnect lead 27 to circuit breaker output.

2. Disconnect lead 10 from circuit breaker

input.

3. Place red lead of multimeters in lead 10

and black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

Is voltage present?

I

Replace circuit breaker (para 8-33).

1. Reconnect lead 10 to circuit breaker input.

D

2.

isconnect lead 82 of engine disconnect

bracket-to-driver's

bulkhead

lead

assembly

from master relay.

3. Place red lead of multimeters in master

relay and black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

Is voltage present?

I

(para 3-3b)

.

Troubleshoot master relay circuit

CONTINUED ON NEXT PAGE

1

BREAKER

3-159