• Want to add an app icon for this forum to your mobile device's home screen? Check out this thread to see how.
  • Have an event you want to share? Check out the new forum event calendar and how-to use it in this thread here.
  • To both new members and existing members, please read this thread about posting your topics in the correct sub-forum. It makes my job (and my life) a lot easier!

Rubicon Locker Lights Flashing When Lockers Are Engaged

Mudguard2004

Member
Joined
Apr 2, 2017
Messages
87
Location
Concord, CA
I've read several threads on this board on how to diagnose lockers that are not working on a Rubicon. However, this one is a little different. I had thought my locker compressor was not working because the lights on the dash continued to flash when I tried to engage them. Both front and rear flash and will not go constant indicating that they're engaged.

Today, I finally had someone to help me out and we followed all of the recommendations. We checked the electrical and all was good. The compressor was in fact turning on (the stock compressor was simply too quiet for me to hear on my own). We pulled the hoses and found the diffs were getting air. I then backed it up slowly and it was quite obvious from the steering wheel that the front lockers were engaged. The rears were also engaged. Problem is, the lights on the dash continued to flash as if the lockers are not engaged.

Anyone had this problem before? Any ideas or advise would be appreciated.


Sent from my iPad using Tapatalk
 

Hitalikmike

New Member
Joined
Jun 17, 2017
Messages
9
Location
US
Get online and find a electrical schematic. If you aren't familiar with electrical troubleshooting find someone who is and get this help. Trace out the circuit with a multimeter and or test light to isolate the problem.

Sent from my XT1585 using Tapatalk
 

Hitalikmike

New Member
Joined
Jun 17, 2017
Messages
9
Location
US
Sounds like the signal from the locker engaged switch is not getting back to the PCM.

Sent from my XT1585 using Tapatalk
 
  • Like
Reactions: 707kevin

Hitalikmike

New Member
Joined
Jun 17, 2017
Messages
9
Location
US
Since it's from both lockers It is probably at a point in the circuit common to both lockers.

Sent from my XT1585 using Tapatalk
 
OP
Mudguard2004

Mudguard2004

Member
Joined
Apr 2, 2017
Messages
87
Location
Concord, CA
Thanks. I just requested the schematics. Brand new the the Jeep and still learning. Thanks for the advice.


Sent from my iPad using Tapatalk
 

Hitalikmike

New Member
Joined
Jun 17, 2017
Messages
9
Location
US
I looked up a diagram. Not sure if it's your model but it shows a Dark Blue ground wire with a yellow tracer from the fuse box to a connector. Looks like a good place to start.

Sent from my XT1585 using Tapatalk
 
  • Like
Reactions: Fughuert

Jerry Bransford

TJ Guru
Supporting Member
Joined
Nov 9, 2015
Messages
12,364
Location
Escondido California
Have you tried driving around doing s-turns? Rubicon and similar selectable lockers will not lock and the lights will continue flashing until you have made enough turns so they can lock. They will seldom lock just driving straight and they will never lock when sitting still.
 
  • Like
Reactions: JeepZilla380
OP
Mudguard2004

Mudguard2004

Member
Joined
Apr 2, 2017
Messages
87
Location
Concord, CA
I have not tried that. Thank you. I'll give that a try. I'm also thinking, since I Judy purchased it, they may have not used them much. I may just need to wake them up! Thanks for the reply.


Sent from my iPad using Tapatalk
 

Jerry Bransford

TJ Guru
Supporting Member
Joined
Nov 9, 2015
Messages
12,364
Location
Escondido California
I have not tried that. Thank you. I'll give that a try. I'm also thinking, since I Judy purchased it, they may have not used them much. I may just need to wake them up! Thanks for the reply.
Think of a flat screwdriver blade and a screw slot... that's how the locker locks. You have to turn one or the other but not both together so the (locker's) slot and the blade can align so they can lock together.
 
Last edited:

Bill D

Member
Joined
Nov 15, 2016
Messages
42
Location
Colorado Springs, CO, United States
I had the same problem with my 2003 Rubicon so was glad to see this thread. Jerry's answer puts to rest the question I had concerning the flashing lights/failure to lock indications. I went out and tried it an sure enough, all it needs is a little steering wheel manipulation and forward motion to make it lock right up. Thanks much, Jerry!
 
  • Like
Reactions: Jerry Bransford
OP
Mudguard2004

Mudguard2004

Member
Joined
Apr 2, 2017
Messages
87
Location
Concord, CA
Did the same yesterday. The lockers are definitely working. The thing climbed easily over problem areas for non-locked rigs. Now I have to trace the electrical issue with the flashing lights. Thanks for all the feedback!


Sent from my iPhone using Tapatalk
 

TyJ

New Member
Joined
Jan 22, 2019
Messages
3
Location
Louisiana
Did the same yesterday. The lockers are definitely working. The thing climbed easily over problem areas for non-locked rigs. Now I have to trace the electrical issue with the flashing lights. Thanks for all the feedback!


Sent from my iPhone using Tapatalk
Ever have any luck with the flashing indicators? Have looked at multiple recommended fixes and have not been lucky.
 
OP
Mudguard2004

Mudguard2004

Member
Joined
Apr 2, 2017
Messages
87
Location
Concord, CA
Ever have any luck with the flashing indicators? Have looked at multiple recommended fixes and have not been lucky.
Jerry’s solution worked for me. Turn on lockers and drive a small distance and the flashing stopped.


Sent from my iPhone using Tapatalk
 
  • Like
Reactions: Chris

AndyG

TJ Expert
Supporting Member
Joined
Jul 30, 2018
Messages
4,193
Location
Alabama
Typically the flashing isn't a defect ...it's the sensor telling you the locker is partially engaged . It's a good thing . Also , if it's new to you , and regeared , you could have some Rubicon sensor pins that may not be hooked on the locker flange...if you hear a popping sound, stop driving it and get it to a good shop that knows Jeep's well, and Rubicon s. You can pull the pins from the diff and put an oil plug in and make it safe to drive if that is the issue .
 

TyJ

New Member
Joined
Jan 22, 2019
Messages
3
Location
Louisiana
Ok thanks. I’m sure it isn’t regeared. It’s bone stock with right at 50k miles. I lifted it on jack stands and verified the lockers engage(all tires spin foward) Thought maybe the diff sensors were bad. I tried Jerry’s solution but was on pavement. I’m not sure if that matters.