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 260 of 1275

TM

9-2350-311-20-1

3-3

TROUBLESHOOTING CHART — CONTINUED

m. ALTERNATOR CIRCUIT (M109A2/M109A3) —

ALTERNATOR FAILS TO CHARGE BATTERIES; GAGE

CONTINUED

INDICATION: NOT CHARGING, UNSTEADY OR

INACCURATE READING — CONTINUED

CONTINUED FROM STEP F

1. Reconnect lead 82 of engine disconnect

bracket-to-driver's

bulkhead lead assembly

to master relay.

2. Disconnect engine disconnect bracket-

to-driver’s bulkhead lead assembly

from driver’s bulkhead.

3. Place red lead of multimeters in lead 49

and black lead to ground.

4. Turn MASTER switch ON and check for

voltage.

5. Turn MASTER switch OFF.

.

I

Is voltage present?

I

Repair or replace lead 10 of power

lead wiring harness (para 8-54,

M109A2; 8-55, M109A2/M109A3).

Repair or replace lead 82 of

engine disconnect bracket-to-

driver’s bulkhead lead assembly

(para 8-45).

3-160