Rear Accessory Socket Inspection

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Remove the following parts:
1. Trunk board (See TRUNK BOARD REMOVAL/INSTALLATION .)
2. Bass-box (with Bose®) (See BASS-BOX REMOVAL/INSTALLATION .)
3. Sub-trunk (See SUB-TRUNK REMOVAL/INSTALLATION .)
4. Trunk end trim (See TRUNK END TRIM REMOVAL/INSTALLATION .)
5. Rear accessory socket (See REAR ACCESSORY SOCKET REMOVAL/INSTALLATION .)
Connect the tester probe to the position shown in the figure and verify that there is continuity.

Courtesy of MAZDA MOTORS CORP.

If it cannot be verified, replace the rear accessory socket. (See REAR ACCESSORY SOCKET REMOVAL/INSTALLATION .)