The basic signal a 0~10volt pulses comes from the sensor on the gearbox on pin3 and goes to pin19 on the engine ecu & to pin2 of the combination control unit, this sends a serial data signal to the speedo head unit from pins 8 & 21 to the speedo pins 3 & 6
nigel
October 2011
howtomendit.com for free repair help, information and advice.
