The reason your fan will run without connecting up the resistor is cuz the resistor is only in the circuit for LOW [a/c] fan. It is bypassed for the high
[ coolant temp] fan.
So, you now have high fan, but no low..hook it back up.
The same fuse [ D] feeds both high and low fan .
Sometimes the fuses just have to be rotated in there socket to remake a good connection...