anyone out there got any wiring diagrams for main ECU box,as i have got an intermittent fault which displays the fault light,on taking it to vauxhall they plugged it in & told me Crankshaft sensor wanted changing,this they did but light comeson still & fault code still says crankshaft sensor.

On looking at wiring which vauxhall told me the problem was wiring i found the 3 pin connector to crankshaft sensor had broken middle wire,i replaced this.
Then on looking at ECU found i had 4 wires crimped together & taped up approx 30mm from the ECU plug!! is this normal or has someone hacked the loom about.
Any info or Diagrams would be appreciated

Thanks Darren