Hello All, i have a Disco 1 with the ABS Light that is on. I did the paper clip jumper trick and got 4-12. I checked the ABS Sensor and there was no resistance. Ordered a new one, swapped them and tried the paper clip trick again and it does not want to go out. How hard can I "tap" it down? How much of the collar should be left visible above the wall of the hub? I checked the new sensor and it had the correct resistance.

Thanks
John Carlson

 

4-12 is the Right Front sensor. There should be less than 1/4" (estimating) of the metal section outside of the housing. Tap it down until it stops. It will bottom out without much resistance.

Here is the blink code procedure... https://www.rswsolutions.com/index.p...ry-i-abs-codes

There is some more technical info in the Wabco manual in the google drive linked in my signature.

 

So, I have followed the instructions, but the light does not go out. It stays on even after i pull out the 16 gauge wire during the sequence. The replacement Sensor is brand new.

 

I saw on another site to remove the ABS relay before doing the ABS blink check, is that true? And where is it located?

 

The ABS sensors are pressed in until they contact the sensor ring or CV toothed ring. Rotation of the wheels will "knock back" the sensor to proper position. They are held in by friction by a small springy metal insert. I've read the springiness gets loose and require replacement some times. My mechanic has a good OBD scanner that can see the pulses from each wheel sensor.

I worked on mine quite a bit of time and found the front gap would grow in the front and turn on the fault light. Then I would need to reach around the tire and press the sensor back in with a flat screwdriver (I could feel the click). I also found the anti-lock would activate during slow braking turns at the edge of the cliff (boy is that exciting) or in the parking lot. So, I disabled ABS by pulling the pump fuse. The dash light is on all the time, but my truck stops whenever I want it to. That was my trade-off. I think it's safer that way.