O3 Rubicon Locker Problems Any Help - Pirate4x4.Com : 4x4 and Off-Road Forum
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Newbie General 4x4 Discussion>O3 Rubicon Locker Problems Any Help
03rub 07:01 AM 09-01-2005
I have a 03 rubicon and the lockers stop working after a few miles,It started at fordice and was the same at ducie this weekend,the rear flash and the front wont lock at
all after a few miles.The dealer wont work on it .I can rewire but would like to keep stock.has anyone had this problem.If i let it sit over night they work again for a few miles and start flashing again and don't work.I have inspected both front and rear and changed oil with no change. It seems the pump is not turning on,or is then gets hot and stops. ANY HELP
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FlexyTJ 07:13 AM 09-01-2005
First off.. this needs to go in newbie.

Second off- why isn't in covered under warranty? The dealer can't 'refuse' to work on it... go to another dealer... :-)
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bnine 08:01 AM 09-01-2005
Originally Posted by FlexyTJ:
First off.. this needs to go in newbie.

Second off- why isn't in covered under warranty? The dealer can't 'refuse' to work on it... go to another dealer... :-)
Before it gets to noobie.

It doesnt matter if they flash as long as the pumps are getting air to the locker.

The flash is from the sensors, which work independently of the locker and the pumps.

Have someone engage them while you listen to the pumps. If they chirp for about 2 seconds then stop you are getting air and the system is sealed. Lockers should work.

If they still flash, its a bad sensor and nothing to worry about.

If the pumps run on when engaged, the locker isnt getting air. Most common is the line comming off inside the housing because of a weak PoS clip they use.

You can rip the sensors right out and the lockers will still work. The indicators just flash all the time.

HTH

And yeah, it should be covered under warrenty but its pretty simple fixes anyways. And if you tore off sensor wires from wheeling they wont cover them, and the sensors arent worth the 100$ a pop the dealer wants for them.
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zman-az 09:27 AM 09-01-2005
Also check for split hoses. Mine has had them and I had to use nylon ties to prevent the hose from splitting.
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03rub 10:01 AM 09-01-2005
I AM NOT A NEW BE,THAT SEEMS TO BE THE ANSWER TO EVERYTHING.I have take'n to dealer and they won't work on 6.5 lifted with 35's and i have changed the gears to 488's. I have also checked the lines and my problem is when the jeep runs a few miles locked they stop working,the pumps won't turn on.I got the new switch for the t case and the locker pump rocker unit the problem seems to be electrical and the dealer won't work on non stock jeeps .I JUST ASKED A SIMPLE QUESTION has anyone with a rubicon had this problem.
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Steve N 12:43 PM 09-01-2005
and you got some great detailed answers about a fairly simple problem. Your dealer can't refuse to work on your rig. He can not warranty things affected such as driveshaft, and gears, but if it's not something you touched there is a law that aplies to this. You might want to ask in newbie if someone can quote it.

:-)
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fullsped 12:53 PM 09-01-2005
I know a few people who have had problems with the lockers on their Rubicon's. One even went the Detroit route. However, I do know that the internal engagement mechanism hits the diff cover and can keep the locker from engaging or disengaging. A friend of mine (Jeff @ Overkill Jeep Fab) showed me this and even showed me the inside of the cover where you can see it had been hitting. There was no physical damage to the diff cover. It is very close clearance in there. Anyway, pulling the diff cover and looking for scarring would be an easy trouble shooting thing. I hope this helps.
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Pietro 06:10 PM 09-01-2005
there is a service bulletin for locker engagement, I will check tomorrow for what it specifically fixes, it reflashes the locker computer. I think it is for the lockers disengaging after the vehicle sits. I'll check tomorrow
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03rub 07:35 AM 09-02-2005
Sensors Are There,air Lines Are Tight,threre Are No Leaks,bolts In Ring Gear Are Tight,drain Plugs Are Not Next To The Center Hub,the Lightg Never Flashed Before,tested The T -cases Sensor.the Lockers Are Not Pumping When You Use Them For A Few Times.the Dealer Refused To Work On The Jeep They Said Its Too Modified And The Can't Drive It Until It Stops Working.i Do All My Own Work But This Problem Is Making Me Mad.thought This Was A Tech Help Web Site And Some People Are Great With Help But Most People Just Want To Play Grab Ass With Jeep Problems And The Answer Is Allways New Bee.
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Pietro 12:39 PM 09-03-2005
Here is the TSB:
doesn't sound like it will fix your problem though

SUBJECT:
FLASH: Off-Roading In 4WD Low Range - Axle Lockers May Unlock When Ignition Key Is
Cycled
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
MODELS:
2005 (TJ) Wrangler
NOTE: This bulletin applies to Wrangler Rubicon vehicles equipped with the Tru-Lok
axle differential lockers (sales code DSE) and built prior to January 31, 2005
(MDH 0131XX).
SYMPTOM/CONDITION:
The front and rear axle differential locker may electrically disengage so that each locker
may unlock if the ignition key (switch) is cycled from the ON to the OFF position and then
cycled back to the ON position. The vehicle operator may prefer that the differential lockers
remain in the “LOCKED” mode even when the ignition key is cycled. This may be a
preferred feature when the vehicle is being used for off-road purposes.
The new software will now maintain the front and rear axle differential locker in the
“LOCKED” mode (will not disengage electrically) if the ignition key (switch) is cycled.
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EHess 05:08 PM 09-03-2005
Magnusom Moss Warranty Act
Originally Posted by Steve N:
and you got some great detailed answers about a fairly simple problem. Your dealer can't refuse to work on your rig. He can not warranty things affected such as driveshaft, and gears, but if it's not something you touched there is a law that aplies to this. You might want to ask in newbie if someone can quote it. :-)
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnusom Moss Warranty Act )
[Reply]
Surfzup2k3 09:11 AM 09-04-2005
Originally Posted by EHess:
Magnusom Moss Warranty Act

Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnusom Moss Warranty Act )

and i'm pretty damn sure that adding 35s and 4.88s are putting a freat deal more stress on the lockers
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94stepsideford 10:42 AM 09-05-2005
Originally Posted by Surfzup2k3:
and i'm pretty damn sure that adding 35s and 4.88s are putting a freat deal more stress on the lockers
its not theat they have to prove it caused or helped break the part..usually YOU have to prove it DIDNT. Which its pretty easyfor them to go against you seeings big tires put more stress on everything :-)
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Pietro 05:55 PM 09-06-2005
give me your email address, I will send you the wiring diagrams and the operation and testing description for the locking diff axles. Save yourself the trouble and don't deal with chrysler, they will laugh looking at a built rig. I am surprised no one has said to return it back to stock and they will work on it :-)
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dynamixjk 06:55 AM 08-24-2009
03rub - Did you ever figure out what this intermitent locker problem was. I've got an 03 Model doing exactly as you have described. I haven't gottne into the wiring yet. But Im like you, its either the compressors, or wiring. And It doesn't make since for both compressors to quit if it was a compressor problem. Please le me klnow what you found out. - Ha Haah Well descibed "Grab Ass" I love it. Some of these folks are straight DUMB! I don't think a single member responded to your actual question. Cody
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towdriver 07:55 PM 12-24-2009
03rub... had same problem w/ my 03 rubi. After 100,s of unanswered questions, and process of elimination myself, i bought a new switch from my dealer and problem solved !!My problem began while heavy winching w/ lockers engaged which i think fried the switch. It has a circuit board in it that I think low voltage fouled up. Anyway, the switch cost me a little over $50.00. Give it a try.
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