TROUBLESHOOTING (Continued)

TM 9-4910-663-34 Table 2-5. TROUBLESHOOTING (Continued) MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION Step 15. Using ohmmeter, check for continuity across contacts of relay K6 with circuit breaker CB1 set to ON position. If continuity indication is not obtained, proceed to step 16. Step 16. Using DC voltmeter, check for 24 to 30 volt DC indication across coil of relay K6 with circuit breaker CB1 set to ON position. If no voltage is indicated, set circuit breaker switch CB1 to OFF position, and perform continuity check of wiring and DC AMMETER LOAD & STARTER OUTPUT CURRENT BATTERY CHARGE CURRENT RANGE switch S14. Replace switch S14 if it is defective. Step 17. With circuit breaker switch CB1 set to OFF position, disconnect lead from one coil terminal of relay K6. Using ohmmeter, check for relay K6 coil resistance between 60.3 and 70.4 ohms. Then reconnect lead. If coil resistance is not within specified limits, replace relay K6. Step 18. Set LOAD SELECTION 50 AMPS/25 AMPS switch S22 to OFF position. Set LOAD SELECTION 50 AMPS/25 AMPS switch S21 to ON position. With circuit breaker switch CB1 set to ON position, check for 0.57 ohm ±5% indication between REGULATOR B+ and REGULATOR B- binding posts, using ohmmeter. If resistance indication is not as specified, proceed to step 19; if resistance indication is normal, proceed to step 21. Step 19. Set LOAD SELECTION 50 AMPS/25 AMPS switch S21 to OFF position. Using ohmmeter, check for 1.14 ohm ±5% indication between REGULATOR B- binding post and each of terminals 15 and 16 of load bank. If either indication is not as specified, replace load bank element. Step 20. Using ohmmeter, check for continuity across each set of contacts of LOAD SELECTION 50 AMPS/25 AMPS switch S21 with switch S21 set to ON position. Change 1 2-29