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Old 06-30-2010, 07:00 PM
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4wd light on dash @ss backwards

ok. I was going through the motions of shifting from 2H to 4H to 4L and back again. I like to do so periodically to practice for a smooth shift transition, you know the practice makes perfect thing.

We'll something weird happen. Now when I shift into 2H the 4wd light on the dash is displayed even though I'm in 2H and when I shift into 4H the 4wd light goes off.

Again I've tried just going through the motion of shifting up and down and down and up at a stand still and on the move but, still the 4wd light will stay on in 2h and goes off in 4H.

Please Help! Any suggestions would be welcome.
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Old 06-30-2010, 07:08 PM   #2
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Put a piece of tape over the light.

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Old 06-30-2010, 07:11 PM   #3
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Put a piece of tape over the light.
LOL...you forgot the most important part.

2.) engage 4WD

3.) remove tape
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Old 06-30-2010, 07:20 PM   #4
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Its a Jeep thing...... Nothing works perfect, but it will get you through more than you think...
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Old 06-30-2010, 07:36 PM
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hahahaha. Seriously.
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Old 06-30-2010, 08:26 PM   #6
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Check out the wires underneath going into the sensor. The sensor for the 4wd light screws into the Transfer case its right next to where the shift linkage goes into the case. All of this is assuming you have a NP231 Transfer case. Also could be the sensor itself.
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Old 06-30-2010, 08:34 PM   #7
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I have a question relating to this thread. When I pull into 4X4 (Hi or Low range) my dash light says "Part Time" There is also a "Full Time" light on the dash but it has never been illuminated. What gives with that?
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Old 06-30-2010, 08:41 PM   #8
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I have a question relating to this thread. When I pull into 4X4 (Hi or Low range) my dash light says "Part Time" There is also a "Full Time" light on the dash but it has never been illuminated. What gives with that?

TJ and Xj dash backgrounds are the same.. xj had option for full time system...
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Old 06-30-2010, 08:43 PM   #9
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Which one is the XJ?
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Old 06-30-2010, 08:44 PM   #10
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which one is the xj?
cherokee 1984ish-2001
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Old 06-30-2010, 08:47 PM   #11
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I knew that. I forget sometimes which is which. :/
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Old 07-01-2010, 09:32 AM
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Not sure about the NP231 transfer case but, I have a 04 rubicon with the NV3550 tranny. Inline 6 cly. manual engine.

From doing a bit of research and the help of for 4 X 4, this sensor just screws into the trasfer case, Correct? is this a common problem with jeeps?

Can you reset this by disconnecting the positive battery cable?
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Old 08-01-2010, 08:43 PM   #13
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hi, I have the same year rubicon. Same problem as well. I have also noticed that the light stays off in 4wd low and I can't lock my rear or front axle diffs. Are you able to lock the diffs?
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Old 10-21-2011, 07:00 PM   #14
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So I figured out what's up with the rubicon's 4wd light. I found out that the rubicon's wiring is set up different. On a normal TJ, the light is just a light that's controlled by the switch in the transfer case. On a rubicon, the sending switch sends a signal to the PCM and then the light is then controled by the PCM. It's because the PCM also controls if you can lock the diffs or not (that was what was killing me--i could care less about the light, but I wanted to lock my diffs.) What fixed it for me was resetting the PCM.
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Old 10-21-2011, 08:06 PM   #15
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I put a small piece of electrical tape over mine also (same problem 06 rubi)
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Old 03-30-2012, 07:56 PM   #16
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So I figured out what's up with the rubicon's 4wd light. I found out that the rubicon's wiring is set up different. On a normal TJ, the light is just a light that's controlled by the switch in the transfer case. On a rubicon, the sending switch sends a signal to the PCM and then the light is then controled by the PCM. It's because the PCM also controls if you can lock the diffs or not (that was what was killing me--i could care less about the light, but I wanted to lock my diffs.) What fixed it for me was resetting the PCM.
how do you reset the pcm
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Old 03-30-2012, 07:57 PM   #17
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how do you reset PCM.i have the same problem with my 2004 rubicon
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Old 03-30-2012, 08:03 PM   #18
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how do you reset PCM.i have the same problem with my 2004 rubicon
Disconnect the battery neg cable, turn on the headlights to drain any residual electricity (they won't come on but that open circuit will dissipate the residual) wait 5 min and hook it back up.
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Old 04-22-2012, 06:54 PM   #19
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Originally Posted by bpm54 View Post
ok. I was going through the motions of shifting from 2H to 4H to 4L and back again. I like to do so periodically to practice for a smooth shift transition, you know the practice makes perfect thing.

We'll something weird happen. Now when I shift into 2H the 4wd light on the dash is displayed even though I'm in 2H and when I shift into 4H the 4wd light goes off.

Again I've tried just going through the motion of shifting up and down and down and up at a stand still and on the move but, still the 4wd light will stay on in 2h and goes off in 4H.

Please Help! Any suggestions would be welcome.
I just got a 93 YJ and am having the same issue the original poster is having. Did you ever figure out what it was?
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Old 12-03-2012, 06:23 PM   #20
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I put a small piece of electrical tape over mine also (same problem 06 rubi)
OK, but you won't be able to engage your stock lockers!
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Old 12-03-2012, 06:32 PM   #21
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I just got a 93 YJ and am having the same issue the original poster is having. Did you ever figure out what it was?
If this is a stock YJ, you have a 231 transfer-case and the lights really don't affect the functionality of your ride. That said, you either have a short or the position sensor is not working right. You can buy a new AIRTEX 1S4219 sensor for around 30-40 bucks plus shipping. I have a spare I'll sell you for 20 plus shipping. Again, you really don't need it as the lights are cosmetic/informational only.

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