Speedo Issue

[nick64merc]

I am new to the community. I just picked up a 97 S14 with a SR20DET in it. I am not sure on the year of the motor and how i could Identify it, but the previous owner said it is a S14 SR20. The speedo doesnt work everything is all plugged in on the tranny and nothing works for the Speedo. The tach and all the rest of the gauges and lights work just not the speedo. I was wondering if there is some sort of mod that needs to be done in order to make it work or if I need to test the sensor or whatever. I want the crusie control to work and I know it realy's on the speedo. I am pretty car savy, but i am new to this car and not sure on what works with what. Any help anyone could provide would be appreciated.

I am in Oceanside CA

Thanks Nick