Accessory Socket Inspection

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
Remove the accessory socket. (See ACCESSORY SOCKET REMOVAL/INSTALLATION .)
Connect the tester probe to the position shown in the figure and verify that there is continuity between accessory socket terminal B and C.

Fig 1: Checking Continuity Between Accessory Socket Terminals
Courtesy of MAZDA MOTORS CORP.
- If it cannot be verified, replace the accessory socket. (See ACCESSORY SOCKET REMOVAL/INSTALLATION .)