If this is an electronic unit, the heat generated after the lights are on for one half hour, is affecting the intergrity of the electronic circuit board.
you can go to speedometer and out of speedometer
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 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.
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.
why would a speedometer stop working on a Mazda
relay
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.
I would like to know that answer as well. My speedometer isn't even close to accurate. Also, my brake light stays on now. I can reset it by disconnecting the battery, but about 10 - 15 miles later, it comes back on. These issues occurred at the same time. It may be related to me towing a trailer and connecting the lights a short time before. Any assistance would be appreciated.
The gears in the speedometer are stripped. If the odometer is working then you have input.
TCM Malfunction, And/Or Speedometer Sensor Malfunction.
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.