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ENGINE MANAGEMENT SYSTEM - V8 DESCRIPTION AND OPERATION 18-2-13 Connector 5 (C0638): This connector contains 9 pins and is used to control the ignition system. The ignition coils are Pin out details connector C0638 Pin No. Function Signal type Reading 1 Not used - - 2 Ignition , Cylinders 2 and 3 Output Switch to earth 3 Not used - - 4 Not used - - 5 Ignition coil earth Earth 0V 6 Ignition , Cylinders 1 and 6 Output Switch to earth 7 Ignition , Cylinders 4 and 7 Output Switch to earth 8 Ignition , Cylinders 5 and 8 Output Switch to earth 9 Not used - - |