The Nissan X-Trail is a compact crossover SUV produced by the Japanese automaker Nissan since 2001. The first-generation X-Trail uses the Nissan FF-S platform, shared with the Nissan Almera and the Nissan Primera.
The following wiring diagram and electrical system schematics provide detail explanation about the 2006 Nissan X-trail electrical system which covers discussion on Lighting System (headlamp, turn signal, hazard switch, stop lamp, back-up lamp, illumination, etc), Starting and Charging System (battery, power supply routing, electrical unit, fuse block, fuse and fusible link box), Auto Cruise Control System, Body Control System, LAN System (precautions, trouble diagnosis work flow, CAN Communication, etc), Power Supply, Ground, and Circuit Elements (includes power supply routing, ground, harness, electrical units location, harness connector, etc), Wiper, Washer and Horn System (front wiper and washer system, rear wiper and washer system, power socket, power supply routing, etc), Audio, Visual and Telephone System (includes audio antenna, navigation system, etc), Driver Information System (covers topics on combinations meter, warning lamps, warning chime, power supply routing, etc).
Find more information about Nissan X-trail Wiring Diagram and Electrical System Schematics here. (source:bojo.hopto.org)

Posts
I have troubled with my nissan x-trail 2001 color wiring. I do not know which color to Engine Control Relay – to ignition switch – to ground – to injector – and so on. would you please tell me how to find it ?
July 14, 2009 @ 8:25 am
i want to know that which colour wire in Nissan primera air flow meter is signal wire and which colour wire is communication wire , please let me know as soon as possible will really appreciate
thanks
November 9, 2009 @ 5:39 am
I have aproblem with my Nissan xtrail 2002 model wen it sterted it take short time then it main fuse get melt. tell me what is it
November 14, 2009 @ 9:37 pm