Following a successful rolling road session when new ECU ( MBE) unit was fitted, I noticed that the speedometer no longer worked. On initially turning on the ignition all the dials, including the speedo perform the full sweep function, but there is no MPG reading or mileage addition to the present display. I have replaced the sensing head, although there was no obvious problem with the previous unit ( LED Flashing etc). Am reasonably good at reading electrical drawings, however, what I am not good at is inverting myself under the dashboard! Is anybody able to save me from this ignominy? All ideas welcomed! Bob