Medium and Heavy Trucks
Have Truck Repair Questions? Ask an Expert
Thanks for asking your question. I will try and help you out.
The two wire vehicle speed sensor does not have power going to it. It is a passive sensor. An AC signal is generated from the sensor interfacing with the chopper wheel in the transmission. Most often I find the problem a ailed sensor or a break or short in the wiring that connects to the sensor.
Please reply back if you need more help or have more questions. I am happy to assist.