Need help with Power Steering pump issue

Really in need of some advice on the power steering pump in my 98 impreza type r. It has a bad leak coming from what looks like the back of the sensor. Have changed the o ring at the top of the pump and the sensor and still had the leak so put some uv dye in it and found that it was coming out the back of the sensor so replaced that but the new one is still leaking. Has anyone come across an issue like this before or can offer some advice. I am now completely stumped as to what could cause it too leak out the back. Its almost like the fluid is being forced through the seal of the sensor and coming out of the wire area at the back not around the edges of the sensor.