TM 10-3930-671-24 Table 2-2.  Unit Troubleshooting Procedures - CONT. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION ELECTRICAL SYSTEM (CONT.) 43. BRAKE UGHT DOES NOT OPERATE - CONT. Step 2. Check continuity across option fuse (TB ORD 650). If option fuse has no continuity, replace option fuse (Para 3-22). If option fuse has continuity, go to step 3. Step 3. Check continuity across brake light switch (TB ORD 650). If brake light switch has no continuity, replace switch (Para 3-22). If brake light switch has continuity, replace brake light lamp assembly (Para 3-22). 44. FRONT OR REAR FLOODLIGHT(S) DOES NOT OPERATE. Step 1. Check if one or all floodlights do not operate. If one floodlight does not operate, go to step 2. If all floodlights do not operate, go to step 3. Step 2. Check continuity across malfunctioning floodlight lamp (TB ORD 650). If floodlight lamp has no continuity, replace floodlight lamp (Para 3-24). If floodlight lamp has continuity, go to step 4. Step 3. Check continuity across option fuse (TB ORD 650). If option fuse has no continuity, replace option fuse (Para 3-22). If option fuse has continuity, go to step 4. Step 4. Check continuity across headlamp and/or rear lamp switch (TB ORD 650). If switch has no continuity, replace switch (Para 3-22). If switch has continuity, wire harness faulty, notify DS/GS maintenance. 2-28