Think of a speed sensor as a small generator. The faster you go the more current it produces. Each wheel speed sensor sends that current to a module and the module monitors them. With the vehicle in motion all the wheel speed sensors should read about the same amount of current. When you hit the brakes hard and one wheel locks up because of ice or whatever the module stops receiving current from that one wheel because it is no longer turning. The module now sends a signal to the abs valve block to relieve the brake pressure to that wheel to allow it to spin again. That wheel begins to spin again and it sends current back to the module. This process happens several times a second until all the wheel speed sensors read the same again.
The odometer gets its signal from the speed sensor, so if the (tailshaft) speed sensor is bad then the odometer obviously will not work
Bad speed sensor is a likely culprit
If the speed sensor is broken several things can happen. The speedometer will not work and the transmission may not shift correctly.
check for a faulty speed buffer module
No, I had that same problem with my 1999 Dodge Ram and it did not work till i replaced the speed senser on the trany. Rick
did you check the speed sensor on the side of the transmission?
Output speed sensor
The speed sensor sends a signal to the speedometer to show the correct speed and it sends a signal to the transmission telling when to shift. If the speed sensor is bad the speedometer will not work and the transmission will not shift correctly.
No, the range sensor reads what gear or "range" you have shifted into.A speed sensor reads the speed of an item.No, the range sensor reads what gear or "range" you have shifted into.A speed sensor reads the speed of an item.
What happens with the speedometer is that the speed sensr wares down and has to be replaced. The speed sensor is located to the back of the engine. Take the clip off, then take a 10mm socket and take the bolt holding the speed sensor to the engine off. Then replace the sensor with a new one bolt it into place. Put the clip back on and it should work. The speed sensor is one of the main reasons why it doesnt work.
IF the speedo does not work that means is not getting a signal from the output sensor. Also delayed and erratic and mushy are controlled by the input sensor speed battery level must be correct/ idle speed all this is to the battery of sensors opening and closing at proper perspective intervals.