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rear differential speed sensor
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=83465
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Author:  dewo [ Thu Nov 12, 2015 11:54 am ]
Post subject:  rear differential speed sensor

Good day people. Hopefully there's someone here that can help me.
6 Months ago my speedometer stopped working, brake light + ABS light came on. (2004 Jeep Liberty KJ 2.8 CRD)
I replaced my rear differential speed sensor (MOPAR 56041393AA) and all was back to normal again.

Same happened to me bout a week ago, changed the sensor, but this time nothing changed. Speedometer not working, brake light & abs light on. So I went and changed the wiring to the sensor incld the plug, but still no change.

I've multi-meter tested the Yellow wire and it receives 11v.
Jacked up the rear, Tested the Yellow/Blue wire while spinning he rear wheel, it jumps to 1.5v (only cause I can't spin the wheel fast enough while holding the multi-meter)

Last resort will be to go see the stealers
Any help or input how to solve this will be much appreciated. Thank you.

Author:  flash7210 [ Thu Nov 12, 2015 12:35 pm ]
Post subject:  Re: rear differential speed sensor

Check the front wheel speed sensors.

Author:  dewo [ Thu Nov 12, 2015 3:31 pm ]
Post subject:  Re: rear differential speed sensor

Tnx for the reply correct me if I'm wrong. 02 - 04 kj speedometer works from the rear diff sensor?

Author:  flash7210 [ Thu Nov 12, 2015 3:57 pm ]
Post subject:  Re: rear differential speed sensor

dewo wrote:
Tnx for the reply correct me if I'm wrong. 02 - 04 kj speedometer works from the rear diff sensor?


Dont know for sure.
On my 05 I had a front wheel sensor go bad and my ABS light came on and speedo and odo quit working.

Author:  Mike92104 [ Thu Nov 12, 2015 7:15 pm ]
Post subject:  Re: rear differential speed sensor

dewo wrote:
Good day people. Hopefully there's someone here that can help me.
6 Months ago my speedometer stopped working, brake light + ABS light came on. (2004 Jeep Liberty KJ 2.8 CRD)
I replaced my rear differential speed sensor (MOPAR 56041393AA) and all was back to normal again.

Same happened to me bout a week ago, changed the sensor, but this time nothing changed. Speedometer not working, brake light & abs light on. So I went and changed the wiring to the sensor incld the plug, but still no change.

I've multi-meter tested the Yellow wire and it receives 11v.
Jacked up the rear, Tested the Yellow/Blue wire while spinning he rear wheel, it jumps to 1.5v (only cause I can't spin the wheel fast enough while holding the multi-meter)

Last resort will be to go see the stealers
Any help or input how to solve this will be much appreciated. Thank you.


There's a known wiring issue that will cause an intermittent issue with the rear sensor. The fox is to replace with larger gauge wire. I'll post a link of what I used when I have more time.

Mike

Author:  dewo [ Thu Nov 12, 2015 10:48 pm ]
Post subject:  Re: rear differential speed sensor

Thank you Mike, the Mopar wiring kit I got has two blue bigger wires.

Author:  Mike92104 [ Sat Nov 14, 2015 1:04 am ]
Post subject:  Re: rear differential speed sensor

dewo wrote:
Thank you Mike, the Mopar wiring kit I got has two blue bigger wires.


That's what I got. It fixed my issue.

Author:  dewo [ Tue Nov 17, 2015 7:20 pm ]
Post subject:  Re: rear differential speed sensor

Problem fixed. Replaced the sensor again and all is working fine now.

Author:  jagster936 [ Sun Jul 10, 2022 12:46 pm ]
Post subject:  Re: rear differential speed sensor

There is a Mopar wiring kit? Mine is doing similar, no odometer, temp readouts squirrly; ABS/Brake light on. It was intermittent for months now it's stuck. Not sure if it's wiring or the sensor yet.

Author:  WWDiesel [ Sun Jul 10, 2022 4:46 pm ]
Post subject:  Re: rear differential speed sensor

jagster936 wrote:
There is a Mopar wiring kit? Mine is doing similar, no odometer, temp readouts squirrly; ABS/Brake light on. It was intermittent for months now it's stuck. Not sure if it's wiring or the sensor yet.

Answered your question on your other post. See:> viewtopic.php?p=951022#p951022

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