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 460 of 1275

TM 9-2350-311-20-1

3-3 TROUBLESHOOTING CHART — CONTINUED

ah. SLAVE START/EXTERNAL POWER

(1) NO POWER TO VEHICLE FROM SLAVE START

RECEPTACLE CIRCUIT (M109A4/M109A5) —

RECEPTACLE; SLAVED VEHICLE HAD POWER

CONTINUED

WHEN OPERATING — CONTINUED

CONTINUED FROM STEP D

1. Reconnect NATO slave start-to-external

power wiring harness to driver’s bulkhead.

2. Disconnect leads 49 and 50 from batteries.

3. Place red lead of multimeter on lead 49 and

black lead on lead 50.

4. Turn MASTER switch to SLAVE and

check for voltage.

5. Turn MASTER switch OFF.

I

Is voltage present?

Repair or replace leads 49 and 50 of

driver’s bulkhead-to-batteries lead

assembly (para 8-86).

troubleshoot master relay circuit (para

3-3b).

END OF TASK

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