Lost connection!

[dowen]

I had just returned from a 150mile trip, and as I got out of the car I noticed coolant pouring from under the car, it must have just happened as I pulled into my drive! so how lucky is that?
So, to get at it I had to take the air box, throttle valve, etc, etc, off (xantia V6) just a small pin prick leak on pipe from filler tank. So Ive done an amazing bit of plumbing and replaced most of the pipes under there.
Now Ive got all electrical connections back. Theres a grey one that I know doesn't have a job, but also there's a blue one with just one wire! I just cannot find the socket for it!
With the engine running, and the leak now fixed, the air bag light is on and the temp gauge doesn't work!
So the blue connection must be temp. Does anyone know where the socket is?

Cheers, Dave.

[DHallworth]

There's a air temp sensor on the underside of the pipework somewhere around the air box. It's a fiddly little sod to get back on so would be worth checking you've got it.

If you want, let me know n I'll grab a picture of it!

David.

[xantia_v6]

There are 3 coolant temperature sensors, brown, green and blue. The blue one is fitted to the rear bank cylinder head just below (I think) the thermostat housing. They are shown on the Citroen Service page called "Outlet Tank Switch Probe".

Nearly impossible IIRC to get to without removing the throttle body.

I always thought that the blue sensor (in the head) was for the engine ECU and the greed sensor (in the thermostat housing) was for the temperature gauge?

[dowen]

Thanks for your help, Yes it was the one below the thermostat. I had to remove the throttle body and the air box, as well as all my new plumbing to get at it!
Ive replaced all the pipes under there now. Don't want to get it all off again! Just one little pin prick leak caused so much trouble!
the blue connector is temp gauge! its now working. Air bag lights mysteriously on now, but Ive got my own cure for that, ...1" insulation tape!
Thanks again, Dave.