WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Control System Wiring Diagram [BP] (1 Of 2)
Courtesy of MAZDA MOTORS CORP.
Fig 2: Identifying Control System Wiring Diagram [BP] (2 Of 2)