Originally Posted by heybro

So turns out the speedo will "reset" itself if it looses signal from more than 1 wheel abs sensor. There's a jumper wire procedure to reset the speedo that may get it working temporarily until it looses signal from more than 1 abs sensor again. Hooked up a scan tool and watched it stream live data from the abs sensors and as soon as more than 1 stopped reporting the speedo would die again and have to be reset with the jumper wire procedure.