Harness Connections

This is a list of the harness connectors:

  • ECM (computer, 2 connectors)
  • Injectors (2)
  • Throttle Position Sensor
  • Idle Air Control
  • MAP sensor
  • ESC (spark control for knock retard)
  • Distributor
  • Coolant Temperature sensor
  • Knock Sensor
  • Coil to Distributor

These are the additional wires that need to be connected:

  • Battery +12v
  • Ignition (2, +12v in start and run)
  • Ground (2)

700R4 Connections:

  • TCC (Torque Converter Clutch)
  • VSS (Vehicle Speed Sensor)
  • VSSB (Speed Sensor Buffer, also called DRAC)
  • Brakes (+12v until brake pedal is pressed)

Optional Connections

  • Start (+12v when starter is engaged)
  • ALDL (diagnostic connector)
  • Park/Neutral
  • VSS (if not a 700R4 harness)