TM    10-3930-638-24&P 2-30. LIGHT SYSTEMS MAINTENANCE (cont) c. Rear Blackout Lights (cont). STEP LOCATION ITEM ACTION REMARKS INSTALLATION/REPLACEMENT    (cont) 10 h. Two harness Push  on Light assembly leads (cont) connectors  (6) i. Two bulbs (4) Install Push bulb in, turn 1/4 turn clockwise and release j. Gasket (3) and door (2) Position On body (13) k. Six screws (1) Tighten Until door (2) is securely mounted TESTING 11 Instrument  panel a.  IGNITION  switch Place in ON position b.  VEHICLE  LIGHTS Place in B.O. switch DRIVE  position 12 Rear  of  vehicle Blackout lights Check Rear blackout lights should be on; have an assistant  depress  service  brake  and  check that stop light is on. If on, place IGNI- TION and VEHICLE LIGHTS switches in OFF positions NOTE If rear blackout lights and/or stop lights are not on, refer to troubleshooting,  paragraph  2-24  and  troubleshoot  light  systems. 2-153