U.L.E.P Unidentified lonely electoral plug?
 

So my bike has been stripped apart for far too long now. Just been doing a bit of wiring and noticed a connector, which cannot find/remember what it is for.

It is a 2 pin female plug. black. with the two horizontal slots sitting above one and other like =. (A picture would be good but i can't get photo bucket to cooperate)
And it comes out of the loom next to the plug for the O2 lambda sensor.

Can anyone tell me what it belongs to?

Cheers Tim.

Radiator fan? Is the only other electrical bit near the lambda sensor afaik.