My wife has a 2003 G35 sedan. We recently have had an issue with the AC going out, all controls work just not blowing cold air. Along with this the headlights are stuck on, no tail lights, no horn and wipers do not work. If we drive with radio on and air blowing you can hear a relay behind battery clicking on an off, when this happens lights turn back off but very brief, spastic. I have pulled every fuse in all 3 spots and checked with meter, all fine. My first thoughts were the issues with AC and radio but symtpoms do not match, all controls still work on dash. Wondering if this is the Relay, seems to be the one locate at top left in the fuse box behind battery, not sure what this exactly controls but you can feel it clicking when the issue happens. Any help would be appreciated.