TM    10-3930-638-24&P 2-30. LIGHT SYSTEMS MAINTENANCE (cont) d. Stop and Tail Light (cont). STEP LOCATION ITEM ACTION REMARKS INSTALLATION/REPLACEMENT    (cont) 8 Light brackets at a. Lamp (6) Install Push  lamp  in  socket  assembly  (5),  turn rear of vehicle clockwise  and  release b. Lens (4) Install Turn clockwise on socket assembly (5) hand-tight  only c. Lens (4) and socket Position On light bracket assembly  (5) d. Lock washer (3) and Install  and Until stop and tail light is securely nut (2) tighten mounted e. Two wire leads (1) Push on Harness  connectors TESTING 9 Instrument  panel a. IGNITION switch Place in ON position b.  VEHICLE  LIGHTS Place in SER switch DRIVE  position 10 Rear of vehicle Stop and tail lights Check Tail lights should be on; have an assistant depress service brake and check that stop light is on; if lights are on, place IGNI- TION and VEHICLE LIGHTS switches in OFF positions NOTE If stop and/or tail lights are not on, refer to troubleshooting, paragraph  2-24  and  troubleshoot  light  systems. 2-156