WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Circuit Diagram - Electrical Load Signal (1 Of 2) - EC-LOAD-01
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Circuit Diagram - Electrical Load Signal (2 Of 2) - EC-LOAD-02