extractor fan wiring help needed please

[oldskool]

I'm just in the process off changing my extractor fan , but i'm stuck to which wires go where

from the wall in have yellow , red and blue

and in the extractor i have yellow red and black

which goes to which , as you can see i'm a complete novice.

thanks in advance

[RF Lighting]

There should be some markings on the fan somewhere near the connectors. It is often moulded into the case and can be quite difficult to spot unless you look very closely.

It will say something like L , N , SL

If you can tell us which wire in the fan corresponds to which letter, then we will be able to tell you which wire goes where.