re connecting fan and heat sensor? at base of radiator

hello,
hoping someone might be able to help me please,im not that mechanically minded.i own a 1996 hi jet
i replaced my leaking radiator for new one,to be honest i couldnt remember what plug in connectors went where after(bottom of radiator and fan ones)
the van ticked over and heated up,while i waited for fan to kick in,which it didnt,swapped those connecter bits round,re started van,even though temp gauge didnt get over half way,i could hear water starting to boil then van cut out and wont start,any ideas??? on this and what way round i should put the electrical plug in bits
help much appreciated
taff

ah,thanks to this forum i have downloaded manual,van now starts,had blown engine fuse!,is this possibly due to me getting the fan/radiator electrical connections wrong way round????
cheers

make sure you fill the rad by the book as a lack of water will affect the heat up and the fan kicking in.