ABS ESP Lights Stay ON

[NoMates]

Thanks everyone for your suggestions.

Ill do some poking around this weekend and see what i can find.

Cheers.

[vk2jdh]

Originally Posted by NoMates

I need some help guys.

R
The ABS, ESP and BAS lights come on not long after start up and stay on. I have also heard a couple of clunks from underneath when going slow. I)

Most likely a wheel speed sensor. It is seeing no signal and is testing the system but applying the brakes and the faults out.

Need to read the OBD codes. Bet it's the LH Rear sensor.

[officepolitics]

I had the same issue, when I purchased the Jeep.

Phone App said LHR sensor, bought a new sensor to replace the new old sensor that previous owner had put on, no change.

Read up a bit more US forums, broken wire seemed to be the 2nd most common problem. Off to Jaycar, continuity tester, traced the cables back to ABS module, had continuity.

I could identify the pins on the ABS plug with the continuity tester, but wasn't sure, so onto ebay, bought a service manual downloaded, had good wiring diagrams, and yep I had the right pins.

Made a wiring harness to connect the LHS to the right and vice versa. Also retired the phone app and purchased an Autronic so I could read the data. Spun the wheels LHR wheel registered data through its sensor on the RH input, and RHR didn't register on the LH input, therefore => ABS Module.

Off to the dealer $878 for new ABS module and they installed it all up just over a $1000 ++ all the test gear and a spare rear sensor.

Good luck

[NoMates]

So, I had a look around last weekend but couldn't see anything that didn't look right. Cleaned some connections and sprayed WD-40 almost everywhere.
After about an hour, i took her for a drive but nothing had changed. The lights were all still on.
So on Monday i bit the bullet and booked her into my mechanic. He ran the diagnostics on it and narrowed it down the the RHR wheel speed Sensor.
Thankfully a rel;atively easy fix and not that expensive either.
Cant wait to get her back out there. Thanks for all of your help.