the ABS sensor is bad.
The Rear ABS speed sensor is installed into the top area of the rear differential.
About $60 US
The Mazda ABS relay switch is located on the firewall in the engine compartment. The ABS relay switch will be on the passenger side of the firewall.
how to replace front abs speed sensor
On the rear of the differential. This sensor feeds the speedometer and the rear ABS braking system. Basically a magnet simply held in by a bolt. Has an O ring to seal it.
On a 1994 Mazda B4000, the ABS speed sensor is typically located on the rear differential. It is mounted on the differential housing and is responsible for monitoring wheel speed and providing data to the ABS control module. To access it, you may need to raise the vehicle and remove any protective covers or shields. Always refer to a repair manual for specific instructions and safety precautions.
call your local dealer
Each wheel on a car has it's own sensor, pickup truck/solid rear axle suvs usually have 1 rear abs sensor located in the differential. Abs sensors are located in the hub assembly.
Wheel speed or ABS sensor's are located on the suspension Knuckle Front and Rear.
body control module located
Not on any of mine 95 and 97 models, factory sticker on side of drivers door post will answer your Q