TM 9-2350-287-20-12-19. TROUBLESHOOTING CHART (continued).h. LIGHTS (continued).(11 ) ONE OR BOTH BLACKOUT (60) DRIVE LIGHTSFAIL TO OPERATE. All other lights operate.(continued).CONTINUED FROM AReplace blackout drive bulb (para 7-32).Verify problem is solved.B. 1. Loosen clamp, and remove headlight as-sembly from headlight mount assembly.2. Place red lead of multimeter in socket Dof headlight mount assembly harness andground black lead.3. Have assistant set dimmer switch to lowbeam and turn MASTER switch ON (refer toTM 9-2350-287-10).4. Check for 24 ± 3 vdc.5. Have assistant set dimmer switch to highbeam.6. Place red lead of multimeter on socketE and ground black lead.7. Check for 24 ± 3 vdc.8. Turn MASTER switch OFF (refer to TM 9-2350-287-10).Is voltage indicted at both locations?Repair or replace headlight assembly (para7-31 ). Verify problem is solved.C. 1. Disconnect wires 514 and 515 of harness10921380 from headlight mount assemblyharness.Continued on next page2-173
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