TM10-3930-660-20 Table 2-2. Electrical Troubleshooting (Cont’d) MALFUNCTION TEST OR INSPECTION CORRECTIVE  ACTION BATTERY  SYSTEM 13. Low BATTERY OUTPUT Step 1. Check for low electrolyte level in battery. Add distilled water to battery. Charge battery, para. 8-43 and TM9-6140-200-14. Step 2. Check for loose or corroded battery cables. Clean and tighten cables, para. 8-44. Step 3. Check for bad or weak cell in battery. Test battery using a hydrometer. Refer to TM9-6140-200-14. CAB GROUP 14. BOTH  FRONT AND REAR WIPERS AND WASHER DO NOT WORK Step 1. Check if circuit breaker (CB3) is tripped. l The circuit breakers will trip if there is a shorted or grounded wire. l The  circuit  breakers  will  automatically  reset  after  cooling.  They cannot be reset manually. l Under  normal  operating  conditions,  circuit  breakers  should  never require replacement. However,   if a circuit breaker does not reset after it has cooled, the circuit breaker is defective and must be replaced, para. 8-12. Check circuit for shorts, bad ground, or defective electrical components. Refer to the electrical schematic, page F/O-l. Replace defective  component,  para.  7-3, 7-4, and 7-5. Step 2. Check for faulty wiring in circuit. Check for poor ground connections. Refer to electrical schematic, page F/O-l  . Check for broken wires and loose connections, para. 8-46. 2-19