Chris,

The VSS signal runs in-out of the cluster and creates the signal for the speedo. There is no speedo drive.

If you follow the wiring diagram and trace the insane route this signal takes it is no wonder that the ecu gets a crap or no signal and goes into limp mode.

I replaced every bit of my engine harness and relay/fuse box. I advise others to jump from the VSS to pin 65 first.

DZ