Cleaned hangar. Pulled A/C out and moved things aroiund so the Chevy could be put in the rear of the hangar. Then put A/C back in and reorganized parts and tools for better access. While A/C was out of hangar, ops checked ADI and battery backup. Also attempted NAV check, no reception. Found broken wire in wingtip and failed connection at wing root. Fixed both problems but still no RX. Also failed connection for marker beacon antenna found. Will check transponder connector (same BNC Male type) and repair marker beacon antenna.