Continuity Inspection

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

Remove the upper panel and electric parking brake switch as a single unit. (See ELECTRIC PARKING BRAKE SWITCH REMOVAL/INSTALLATION .)
Verily that the continuity is as indicated in the table.

Fig 1: Electric Parking Brake Switch Wiring Harness-Side Connector

Courtesy of MAZDA MOTORS CORP.

Fig 2: Checking Electric Parking Brake Switch Wiring Harness-Side Connector

Courtesy of MAZDA MOTORS CORP.

Fig 3: Electric Parking Brake Switch Continuity Reference Chart

Courtesy of MAZDA MOTORS CORP.

If not as indicated in the table, replace the electric parking brake switch.