shenaldo

Hi. Hope someone can give me a hand... My 56 reg 350z roadster has developed same problem whereby heating / AC only kicks in when engine warmed up. Having read the thread, I'm pretty sure replacing the relay is the way to go.... however I can't find the bloody thing. I've removed the cover down by the pedals, but can't locate any bolts by the fusebox to remove, to get to the relays as the thread suggests? Could my relays be located in the engine compartment? Any help (with pictures / schematics) would be very much appreciated... Thanks in advance!