I have just replaced the brake pads on my 2013 Discovery LR4. I now need to replace the brake wear sensor, but the problem is that I can't find any way to access the plug at the end of the wear sensor wire to disconnect the existing wear sensor from the wiring loom. The cable just disappears into to wheel arch and I can't see any way to access it from below or above...
Can anyone help with this please?

 

Front or rear? Both can be done with the wheel off the car. Front is typically easier. Rear you can get to but it is tucked behind the wheel arch. If you bend the plastic of the arch back a bit you should be able to get your hand in to disconnect it and attach the new one

It's helpful to wrk from the caliper backwards and unclip the old and clip in each piece of the new along the way. It ensures you Route it the right way and don't miss any clips

 

Thanks for the reply, it was the front one. Good advice about working methodically from the caliper.

I had to take out two of the snap-in plastic studs which hold the plastic inner wheel arch in place in order to be able to pull it out far enough to get at the wear detector plug and, even then, it was none too easy.

A few points to note for anyone else who needs to do this job :-

• The centre piece of the snap-in plastic studs must be removed first, then the rest will pull out. (I broke one of them before I realised this). You can start the centre piece moving with a flat-head screwdriver, then you have to just winkle it out bit by bit before removing the rest of the stud.
• The wear detector plug is locked into the socket on the wiring loom with a non-return clip, you have to press down on a tiny catch on the socket, then pull away the socket from the old plug (with is fixed to the body work - see next point)
• The plug on the end of the wear detector cable is fixed to a plastic insert in the bodywork, the plug also has a non-return catch to stop it coming out of the insert. I found it very difficult to access. After struggling for quite some time, I used a (very) small electrical screwdriver, which I pushed firmly into the back end of the plug to release the catch. It was not easy, but I couldn't see any other way of doing it.

Allowing for my unfamiliarity, it took me as long to do this job as it did to change all four brake pads, maybe even longer! In future, I will aim to change the brake pads before they get down to the wear sensor, to avoid doing this job again.

 

Yes the rear is a pain, but I just did it last weekend, you can remove a few of the black body clips holding the wheel well plastic in place to get at it easier.

 

The front was also difficult, indeed you have to remove several of the wheel arch clips to be able to pull the plastic inner wheel arch out of the way. The socket is then fixed to the bodywork with a clip which has to be released to detach it from the bodywork to get it accessible. The plug that plugs in also has a release catch which has to be operated to pull out the old one before connecting the new.