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Old 03-28-2012, 11:56 AM   #1
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4WD light and Axle Lock ???

I have an '06 Rubicon and noticed my 4WD and 4WDLo light does not work on the dash anymore (it used to). The 4x4 definitely engages, as does the 4x4 Lo. I cannot however engage the axle locks, front nor rear. Is it possible since the 4x4 light isn't working, that the ECU will not allow the axle locks to engage because it doesn't know the Xfer case is in 4WDLo ???

Does this sound like a simple 4x4 switch replacement on the Xfer case ??

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Old 03-28-2012, 02:58 PM   #2
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Makes sense that if the ECU doesn't know the Tcase position it wouldn't lock the diffs, Considering it will unlock the diffs if you shift out of 4 low.

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Old 03-28-2012, 03:02 PM   #3
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Maybe this little sucker?

POSITION SENSOR
DESCRIPTION

The transfer case position sensor is an electronic
device whose output can be interpreted to indicate
the transfer case’s current operating mode. The sensor
consists of a five position, resistive multiplexed
circuit which returns a specific resistance value to
the Powertrain Control Module (PCM) for each transfer
case operating mode. The sensor is located on the
top of the transfer case, just left of the transfer case
centerline and rides against the sector plate roostercomb.
The PCM supplies 5VDC (+/- 0.5V) to the sensor
and monitors the return voltage to determine the
sector plate, and therefore the transfer case, position.
OPERATION
During normal vehicle operation, the Powertrain
Control Module (PCM) monitors the transfer case
position sensor return voltage to determine the operating
mode of the transfer case.


AIRTEX Part # 1S4129 {#SW4400}
(w/Rock Trac) (Located on Transfer Case)
$77.79
http://www.rockauto.com/catalog/raframecatalog.php
(Look under "Switch" heading)
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Old 03-28-2012, 04:42 PM   #4
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Here is how to test it
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Old 03-28-2012, 05:20 PM   #5
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Thanks guys, that is the info I was looking for. Just wanted confirmation to my thinking !!!
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