Originally Posted by iNfEk
Are you sure you're messing with the correct connector? The main harness connectors are on the drivers side inside the engine bay behind the battery. There are two connectors. One brown. One black. You'll be putting them into the brown one and running them into the car and connecting the other end onto the ECU connectors.
You'll need to remove the locking piece before you can put the connector in.
By the way I noticed you said I should of installed the ia performance avcs harness into the brown connector behind the battery.. The instructions clearly said to install into the black connector. Are you sure it's the brown?