micra c+c 1.6 2006 radiator fan switch location

i had to fit a new rad so also had to release the air con. there is currently no air con pressure. its also had a new thermostat.

my rad fan isnt coming on when engine is hot or when i press the air con button (probably because ther is no pressure?) does anyone know where the radiator fan switch is on these. ive looked all through the manual. the only switch on the radiator is the air con pressure sensor. theres 3 wires 6 volt, ground and signal. if i touch the 6 volt and signal then the radiator fan is on constant. does the air con pressure sensor double as a radiator fan switch. the air con rad and cooling rad are one unit with one fan and not 2 separate ones.

thanks
 
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