Brake Switch Inspection

WARNING: This page is about a different car, the 2017 Mazda CX-9. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

Inspect the brake switch with it installed to the brake pedal, otherwise the brake switch may not operate normally. If the brake switch is removed from the brake pedal, replace the brake switch with a new one.

Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
Disconnect the brake switch connector. (See BRAKE PEDAL REMOVAL/INSTALLATION .)
Verify that the continuity is as indicated in the table.

Fig 1: Checking Brake Switch Continuity

Courtesy of MAZDA MOTORS CORP.

If not as indicated in the table, replace the brake switch. (See BRAKE PEDAL REMOVAL/INSTALLATION .)

Fig 2: Brake Switch Terminals Continuity Chart

Courtesy of MAZDA MOTORS CORP.