Land Rover Repair: 2 part: Oil leak above filter, AC radiator fans, oil pressure switch, radiator fans

Question
My leak seems to be coming from the (I think it must be)the oil sensor. I cleaned the area with brake cleaner and you see it running down the back side of the sensor but not positive. It was tight when I tried to tighten it. 2nd part: My electric fans in front of the radiator have stopped working. Where is the switch that turns them on and off? Or how do I test them to see if it is the fans or switch?

Answer
It's fairly common to get oil leakage from the oil pressure switch.  Replace it.  

As regards the fans . . . depending upon year, your fans are controlled by the temp switches in the air conditioner, a temp switch on the motor, or the body control computer.

To get wiring diagrams go to www.landrovertechinfo.com, land rover's official service support site.