Originally Posted by
stevieturbo
You dont need either until you've answered my questions.
Is there a specific wire from the ecu to speedo that is only for the speedo ?
Until you can say a definite yes to that, you're wasting your time as the info could be transmitted via a datastream and not a raw voltage signal.
Yes there is a single wire from the ECU to the dash clock for speed. Another single wire for RPM which is fine since I tied it into the EDIS output.