You don't mention the problem you are trying to solve!!
There are some relays in the fuse area under the dash by the offside door. I think one may be fo rthe heater blower supply which comes on when the engine is running.
If the heater is blowing all the time check this:
http://www.johnandchris.screaming.net/berlingo_blower/berlingo_blower.htm
Jon, January 2009
