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 125 of 1275

TM 9-2350-311-20-1

CONTINUED FROM STEP D

1. Reconnect lead 4596 to MASTER switch.

2. Disconnect engine disconnect bracket-to-

bulkhead wiring harness from voltage

regulator.

3. Place red lead of multimeter in socket A

(lead 2) and black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

Is voltage present?

Replace or repair lead 2 of engine

disconnect bracket-to-bulkhead wiring

harness (para 8-45, M109A2/M109A3;

para 8-46, M109A4/M109A5).

1. Place a jumper wire from socket A to pin A.

2. Place red lead of multimeter on pin B (lead

459B/400) and black lead to ground.

3. Turn MASTER switch ON and check for

voltage.

4. Turn MASTER switch OFF.

Is voltage above 18 Vdc?

I

Replace voltage regulator

(para 8-3).

CONTINUED ON NEXT PAGE

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