TM-9-2350-247-20-1 Unit Maintenance Manual Volume 1 M548A1 M548A3 Tracked Cargo Carrier Download
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TM 9-2350-247-20-1 200 AMP NO CHARGE/REGULATION TROUBLESHOOTING (M548A3)—Continued 0025 00 3Y C A U T I O N If voltage climbs above 33 or more volts, shut off engine. Generator could be damaged. 1. Check batteries to make sure they are fully charged TM 9-6140-200-14. 2. Turn off all electrical equipment/loads. 3. Adjust rheostat to maximum resistance. 4. Connect diagnostic test harness leads 1 and 4 together. 5. Start engine and run at 800 rpm and lower resistance. 6. Does voltage rise above battery voltage (test harness lead 3 to ground) to approximately 28 volts? YES NO 3YN 1. Disconnect generator test kit. 2. Replace generator (200 amp) (WP 0246 00). 3. Repeat charging system operational check (WP 0024 00). 4Y 1. Disconnect generator test kit. 2. Replace voltage regulator (200 amp generator) (WP 0251 00). 3. Repeat charging system operational check (WP 0024 00). 0025 00-2