i need help with my harness bought the car a couple weeks ago and the ect sensor plug is connected and were there supposed to be pluged there is a plug with a black/blue and black wires whats that for also theres no plug plugged into the sensor on the thermostat housing someone plz pos a pic or diagram of the wire colors

 

Post pictures of what you have it's a little confusing. Black/Blue and Black sounds like VTEC pressure switch.

 

so tht shouldnt be pluged in

 

If your engine isn't VTEC then yes it'll stay unplugged. Also the wires that plug into your thermostat housing are the fan switch and should be black and green.