the wiring fault/problem , I had was the PO decided to cut both the connectors off for the brakes and the DSc sensor,
Then joining the wires for the brake sensor together on the loom side to fool the car that the sensor was there and working
then the speed sensor module was badly soldered to the main loom and wrapped in white plastic heat shrink
I think I have fathomed some hings out with this . the place I was trying to clean was in fact the top of the driveshaft
the actual sensor is on the back of the wheel bearing
https://www.youtube.com/watch?v=0Ie11xUBNfg
so I needs to find a way to clean the bit "on the side"
plus as well , ive noticed something with the speed sensor I bought to replace the old one
this is the one I originally bought , that doesn't work 34526756380
notice the newer versions
RealOEM.com - Part Search
steve