my advice to u is, take it to an auto-electrician, preferably to nissan themself, but b4 you do that chek the fuse, if the fuse is blown then u cant do anything else urself coz thers about 20 components and about 50 wires u have to chek with a multi-metre yourself before you find the faulty component, i know from experience as this happend to my Honda Prelude Si 4WS, i spent about a day trying to find the faulty component, failed miserably, took it to honda and the guy found it in less than ten minutes, it was a wire that had been cut sumhow, so ye take it to nissan or sum other auto electrician