VSS came from the gearbox. Its an MTX75 box with the 3 wire magnetic sensor.

From there it went into the ECU and is then fed onto the Dash. It would appear the ECU converted the signal from the VSS into Digital for the dash clocks.

When the system was piggybacked I had no speedo either. I think its because the ECu wasn't getting a crank sensor input anymore so didn't think the engine was running..

If I was to put the ECU back in is it possible to use the crank sensor for both an ECU input and also to the EDIS for the megasquirt??