Intruders-Alert

The last few times the fan ran the hot light on dash came on just before. Radiator had a leak. Then fan wouldn't run any more and no hot light, i did have a blown fuse i believe in the power? Socket. Replacing it didn't resolve fan issue.
I replaced radiator (used) and used the sensor that came with it. I ran a hot wire to fan motor and it ran just fine.
Somehow not getting power to it.
Thanks for any help