Stoplight Switch

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Disconnect stoplight switch connectors. Using ohmmeter, check continuity between stoplight switch terminals. See Fig 1 . With brake pedal depressed, continuity should only exist between terminals "C" and "D". With brake pedal released, continuity should only exist between terminals "A" and "B". If continuity is not as specified, replace stoplight switch.

Fig 1: Identifying Stoplight Switch Terminals

Courtesy of MAZDA MOTORS CORP.