Hey guys. I'm going to do my best to ask the right questions here, but because this is not repair related I'm kinda flying blind.

I'm assuming that the speedometer is run by a 5v input based on my reading. I'm also assuming that as the vehicle speed increases, the frequency sent to the speedo via the VSS increases as well.

Does anyone know what the frequency ranges are for the 92 95 speedo? I'm looking for specific figures, ex 60MPH = X Hz.

I'm trying to do two things. One is control the MPH on a speedo outside of the vehicle via an arduino system which is not used for actual vehicle operation, and I also want to make a my own speedo conversion box.