Plug the new conversion harness in between your Civic's C101 plug and the 02-04 engine harness' C101 plug.

1.  Insert the white wire with the pin into ECU plug E8

2.  Connect the black wire with yellow stripe to +12v switched power from the fusebox

3.  Connect the black wire with white stripe to +12v constant power from the fusebox

4.  Connect the 4 wire air/fuel sensor connector to your engine's air/fuel sensor.