The problem could be the output speed sensor on the transmission or the speedo head it self. A scan tool would be helpful
you can go to speedometer and out of speedometer
If the speedometer is not working but the odometer is, I would suspect the dash cluster is at fault. If both speedometer and odometer are not working I would suspect the speed sensor on the transmission is at fault.
If the speedometer and the odometer are not working, I would suspect the VSS (vehicle speed sensor). If only the speedometer is not working I would suspect the instrument cluster has problems.
why would a speedometer stop working on a Mazda
The odometer on a 96 Ford Explorer is tied into the speedometer. If the speedometer is working then there is a gear problem inside of the speedometer causing the odometer to not work.
Not knowing the year, make and model vehicle it limits how much we can help you. If the speedometer cluster is digital and both the speedometer and odometer is not working I would suspect the vehicle speed sensor is at fault. If only the speedometer is not working I would suspect the dash cluster is at fault.
TCM Malfunction, And/Or Speedometer Sensor Malfunction.
The gears in the speedometer are stripped. If the odometer is working then you have input.
If the speedometer and odometer are both not working, I would blame the speed sensor. If only the speedometer does not work and the odometer does work, the cluster is bad.
If the speedometer and odometer both quit I would blame the speed sensor. If only the speedometer quit I would blame the instrument cluster.
On older vehicles, it would usually mean that the speedometer cable is broken or disconnected. On newer vehicles it would probably be a computer problem.
If both the speedometer and odometer are not working I would suspect the VSS (Vehicle Speed Sensor) is at fault. If the speedometer doesn't work and the odometer does, I would suspect the instrument cluster is at fault.