My understanding of the auxiliary fan is it two speeds (high and low) and turns on at two different temps 90c for low and 99c for high (or something like that)Ö

Now my problem is (if I understand the operation correctly) that the fan is only turning on at high speed when the coolant is running hot temp.

Any ideas on why the low temp isnít kicking on the low speed would be great.

Its not the fuse and its not the relays.