TM 5-3805-262-203-11. LIGHT SYSTEMS TROUBLESHOOTING (CONT)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION7. BLACKOUT 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 B.0. DRIVE position.Tell assistant to press brake treadle and valve.Blackout stop lights and driving light should be on .a. If one stop light is on, go to step 5 below.b. If both stop lights are off and driving light is on, go to step2 below.c. If all blackout lights are off, refer to page 3-81, MALFUNCTION1.Step 2. Place vehicle lights switch in SER DRIVE position.Tell assistant to press brake treadle and valve.Service stop lights should be on.a. If one stop light is on, refer to page 3-88, MALFUNCTION 8.b. If both stop lights are off, go to step 3 below.Step 3. Unlock and open front access door.Connect a short jumper wire across stop light switch terminals atbottom of brake treadle and valve.Service stop lights shouldbe on.Place vehiclein B.0. DRIVEBlackout stopbe on.l i g h t s s w i t chp o s i t i o n.l i g h t s s h o u lda .b .If at least one stopl i g h t i s o n , r e p l a cedouble check valve andstop light switch (page7-66) .I f a l l s t o p l i g h t s a reoff, remove jumper wireand go to step 4 below.3-87
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