Brake System Warning Light Does Not Illuminate With Brake Fluid Below Min

1. Disconnect brake fluid level sensor connector. Check for continuity between ground and brake fluid level sensor connector terminal "B". See Fig 1 . If continuity exists, go to next step. If continuity does not exist, repair wiring between instrument cluster and brake fluid level sensor.
2. Check for continuity between ground and brake fluid level sensor connector terminal "A". If continuity exists, replace brake fluid level sensor. If continuity does not exist, repair wiring between ground and brake fluid level sensor.

Fig 1: Identifying Brake Fluid Level Switch Connector Terminals

Courtesy of MAZDA MOTORS CORP.