Accessory Socket Inspection

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Remove the accessory socket. (See ACCESSORY SOCKET REMOVAL/INSTALLATION .)
Inspect for continuity between the accessory socket terminals B and C using an ohmmeter as shown in the figure.
- If not as specified, replace the accessory socket.
  
  Fig 1: Accessory Socket Circuit Diagram And Connector Terminals
  Courtesy of MAZDA MOTORS CORP.