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 454 of 1275

TM 9-2350-311 -20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

ag. SLAVE START RECEPTACLE CIRCUIT (M109A2/NO POWER TO VEHICLE FROM SLAVE START

M109A3) — CONTINUED

RECEPTACLE; SLAVED VEHICLE HAD POWER WHEN

OPERATING — CONTINUED

CONTINUED FROM STEP B

I

c

1. Disconnect lead 50 from slave start

receptacle.

2. Place red lead of multimeter on lead 50 and

black lead to ground.

3. Check for continuity.

Is continuity present?

I

Replace slave start receptacle

ground lead (para 8-38).

[

D

1. Disconnect slave start cable from slave start

receptacle of vehicle being slaved.

2. Reconnect lead 50 to slave start receptacle.

3. Disconnect lead 81 from master relay.

4. Reconnect slave start cable to vehicle being

slaved.

5. Place red lead of multimeter on master relay

terminal and black lead to ground.

6. Turn MASTER switch to SLAVE and check

for voltage.

7. Turn MASTER switch OFF.

Is voltage present?

I

I

Repair or replace lead 81 of engine

disconnect bracket-to-bulkhead wiring

harness (para 8-45).

CONTINUED ON NEXT PAGE

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