2-19. TROUBLESHOOTING CHART (continued).h. LIGHTS (continued).(I) PORTABLE INSTRUMENT PANEL MASTERWARNING LIGHT FAILS TO OPERATE. OtherMASTER WARNING light operates properly.Initial Setup:Tools/Test Equipment:Equipment Conditions:• Digital multimeter (DMM) (Item 13, Appendix 1)• MASTER switch set to OFF (refer to TM• General mechanic’s tool kit (Item 24,9-2350-287-10).Appendix 1)NOTE• Instead of using multi meterfor voltagecheck, STE/lCEtroubleshooting,INDIVIDUALBATTERY VOLTAGE TEST-TEST89 maybe performed.• Instead of using multi meterfor continuity check, STE/lCEtroubleshooting, TEST 91 maybe performed.A. 1. Remove lens and light bulb from MASTERWARNING light socket.2. Place red lead of multimeter in light socketand ground black lead.3. Turn MASTER switch ON (refer to TM 9-2350-287-1 O).4. Check for 24 ± 3 vdc.5. Turn MASTER switch OFF (refer to TM 9-2350-287-10).Is voltage indicated?Replace light bulb (para 7-6).Verify problem is solved.Continued on next page2-139TM 9-2350-287-20-1
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