I finished putting my car together after replacing the timing belt and water pump. I just bought it a month ago with 180xxx miles on it. It's obvious that this car had some front end damage repaired at some point. For example, it did not have the timing belt covers at all. So, I'll find some later on.

I have no idea what this plug is supposed to connect to. I looked all over (before putting the airbox in) and couldn't find it a place anywhere. It's located behind the passenger light and below the airbox.

Can anyone help me?

1998 Audi A6 4 prong plug - what is it? - YouTube

 

no one's got an idea?

 

It connects to A/C condenser.

 

how so? I don't see any place to plug it in on the condenser. Can you be more specific?

 

The connector is not visible without some dismantling. First of all, it is found on the passenger side of the condenser, completely visible with bumper off or passenger side headlight removed. You may want to try to pry the small black plastic piece between condenser and bumper. That black plastic piece is what prevents you from seeing the condenser pressure sensor.
I hope this helps you!

 

I'm still having a hard time finding it. It also appears that maybe I have some a/c lines not connected or something.

Can you tell anything else from this vid? (I removed the head light and have a short ram intake, so it's easier to see)

Where does this plug go? - YouTube

 

From your video I can tell that the condenser is not original, and was replaced at some point. 14th second into the video barely shows that the pressure sensor is missing, as it is supposed to be at the end of that 4-5" aluminum pipe that comes out of the condenser. It appears that there is an empty hole right now.

 

plugs onto high low pressure switch on ac condenser