TROUBLESHOOTING (Continued)

TM 9-4910-663-34 Table 2-5. TROUBLESHOOTING (Continued) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION SYSTEMS D binding posts. If indication is incorrect, proceed to step 2. Step 2. Using ohmmeter, check for continuity across terminals of AC/DC SYSTEMS EQUALIZER COIL TEST switch S35 with switch set to ON position, and for open indication with switch set to OFF position. Replace AC/DC SYSTEMS EQUALIZER COIL TEST switch S35 if either indication is incorrect. Step 3. Using ohmmeter, check for 40 to 50 ohm indication across terminals of equalizer coil potentiometer R24. If indication is incorrect, replace potentiometer R24. 19. AC/DC SYSTEMS IGNITION CIRCUIT a. AC/DC SYSTEMS IGNITION CIRCUIT INOPERATIVE OR OPERATES ERRATICALLY DURING TESTS OF EXTERNAL COMPONENTS. Step 1. Set circuit breaker switch CB1 to OFF position. Connect ohmmeter between REGULATOR B+ binding post and AC/DC SYSTEMS IGN SW binding post. Check for zero indication with AC/DC SYSTEMS IGN SW S33 set to ON position, and open circuit indication with switch S33 set to OFF position. Replace AC/DC SYSTEMS IGN SW S33 if either indication is incorrect. 20. AUXILIARY START CIRCUIT a. AUXILIARY START CIRCUIT INOPERATIVE OR OPERATES ERRATICALLY DURING TEST OF EXTERNAL COMPONENTS. Step 1. Set circuit breaker switch CB1 to OFF position. Connect ohmmeter between pins A and F of BAT connector J6. Check for zero indication with AUX START switch S39 held in ON position. If open indication is obtained, replace AUX START switch S39. 2-59