TM 5-3805-262-203-11. LIGHT SYSTEMS TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION7. BLACKOUT STOP LIGHTS DO NOT OPERATE (Cont).Step 4.Place vehicle lights and ignition key switches in off position.Reach behind right instrument panel and unplug vehicle lights switchconnector by turning connector nut counterclockwise and pullingf i r m l y.Check wiring connection between wiring harness pink-white wire ter-minals at blackout stop and tail lights and vehicle lights switchconnector pin N.a. Repair or replace wiring or connector as necessary (page 5-168or 5-179) .b. If wiring and connectors are okay, remove right instrument panel(page 5-48) and replace vehicle lights switch (page 5-53) .Step 5.Disconnect wiring harness pink-white wire terminal from tail lightwire terminal by grasping both terminals with your fingers and firm-ly pulling them apart.Connect multimeter between wiring harness terminal and chassisframe.Tell assistant to press brake treadle and valve.Multimeter should indicate 24 volts.a. If multimeter indicates 24 volts, connect terminals by graspingboth terminals with your fingers, alining, and firmly pushingthem together. Then replace lamp (page 5-109). If stop lightstill does not operate, replace blackout stop and tail lightassembly (page 5-109).b. If multimeter indicates zero, check wiring connection at pink-white wire terminal. Repair or replace wiring or terminal asnecessary (page 5-179).8. SERVICE STOP LIGHTS DO NOT OPERATE.Step 1.Start and operate engine until air pressure gage indicates in greenarea, then shut down engine.Place ignition key switch in on position.Place vehicle lights switch in SER DRIVE position.Tell assistant to press brake treadle and valve.Service stop lights and driving lights should bea. If one stop light is on, go to step 4 below.b. If both stop lights are off and at least oneon, go to step 2 below.on.d r i v i n g l i g h t is3-88
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