Speed sensor issue

[DTHOMPSON1985]

First of all, I know this has probably been discussed. I tried searching and could not find what I was looking for.

I bought my 2012 jk sport with the ABS and TC lights on. I used jscan and saw that the driver's rear speed sensor was not reading any mph change but all the others were working fine. I changed the speed sensor with no change. I then changed the clip plug leading to the speed sensor. Still no change. I have a full assembly axle with seal bearing and tone ring waiting and ready(I planned to keep this on hand just in case I needed to change a rear axle at any point). I have searched a small amount of the wire close to the speed sensor and found no breaks. I thought about replacing the wires from the speed sensor plug up to the ESC module just to be sure I fix any break in the wire. I have also heard I should clean the tone ring first before changing the wires.

My initial question is, how do I clean the tone ring? Do I need to remove my wheel, break caliper, etc to reach it or is there another way?
Secondly, involving the wires, do they run from the speed sensor along the body up to the fire wall and into the ESC or am I seeing the wrong set of wires and can I just cut this and replace the wires or is that a bad idea?
Thank you for any information you have. This is my first Jeep and I'm learning quite a bit about them.

 

[pc1p]

The OEM tone ring can be kind of a pain in the a$$ to get to, but is doable with hand tools, patience, and some brake cleaner.

The above is a photo of the axle shafts I took out of my daughter's Islander while I was doing the regear. The "toothed" part is the tone ring portion of the shaft. This may have some accumulated brake dust, grease/oil (if the seal is weeping), dirt, etc. I don't have a good photo of it installed, but the ring sits underneath your rear parking brake shoes.

This guy's video shows the location and relationship of all the components back there pretty well, right around the 2:54 mark:

You'll need to pull the rotor off and using a brush, work your way in there. Some brake cleaner will help, as well as some degreaser spray (I used Simple Clean + a hose water hose to get the major gunk off brakes, before using brake cleaner, but try not too get it directly on the brake shoes themselves).

It's very possible that the ring has separated from the shaft too, so that's something to be mindful of. That ring should feel solid to the shaft with no wiggle or gaps.

 

[DTHOMPSON1985]

The OEM tone ring can be kind of a pain in the a$$ to get to, but is doable with hand tools, patience, and some brake cleaner. View attachment 130387

The above is a photo of the axle shafts I took out of my daughter's Islander while I was doing the regear. The "toothed" part is the tone ring portion of the shaft. This may have some accumulated brake dust, grease/oil (if the seal is weeping), dirt, etc. I don't have a good photo of it installed, but the ring sits underneath your rear parking brake shoes.

This guy's video shows the location and relationship of all the components back there pretty well, right around the 2:54 mark:

You'll need to pull the rotor off and using a brush, work your way in there. Some brake cleaner will help, as well as some degreaser spray (I used Simple Clean + a hose water hose to get the major gunk off brakes, before using brake cleaner, but try not too get it directly on the brake shoes themselves).

It's very possible that the ring has separated from the shaft too, so that's something to be mindful of. That ring should feel solid to the shaft with no wiggle or gaps.

Thank you. That video helped quite a bit to understand where the tone ring was able to be accessed. Like I said previously, I have an axle waiting but have never changed one so I wasnt sure if I could access that tone ring any other way aside from disassembling everything.