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Go Back   Hummer Forums by Elcova > Hummer H2 Discussion Forums > Technical Discussion and Customizing your H2

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Old 11-08-2005, 08:21 PM
TroysH2 TroysH2 is offline
 
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What electrical device/s send this message(SERVICE 4WD) to the Instrument Panel. The Locking Rear Axle Button flashes sometimes as well.
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Old 11-08-2005, 08:21 PM
TroysH2 TroysH2 is offline
 
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What electrical device/s send this message(SERVICE 4WD) to the Instrument Panel. The Locking Rear Axle Button flashes sometimes as well.
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Old 11-08-2005, 09:57 PM
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by TroysH2:
What electrical device/s send this message(SERVICE 4WD) to the Instrument Panel. The Locking Rear Axle Button flashes sometimes as well. </div></BLOCKQUOTE>

Encoder motor, 4wd module, diff actuator, etc.
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Old 11-09-2005, 12:48 AM
TroysH2 TroysH2 is offline
 
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Thank you for your reply.

Maybe I should be a little more specific. What electrical device/s initiate a "SERVICE 4WD" message to the Instrument Panel and would also cause the Locking Rear Axle Button to flash.

Thanks
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Old 11-09-2005, 11:44 PM
alecs wife alecs wife is offline
 
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In my experience, that message meant that the coil assembly retainer has failed. This means that the actuator wires have been broken due to the rotation of a component designed to remain stationary. This will require the replacement of the coil assembly because the wires ripped durring rotation. You will need to remove the e-locker, remove the bearing, and C clip in order to remove and replace the coil assembly. The coil will cost you around $150 bucks.

This will be covered under warranty.

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Old 11-09-2005, 11:45 PM
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The wire is connected to the coil.
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Old 11-09-2005, 11:49 PM
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The coil retainer is a 3/16 this hardened wire that fractures under pressure.

the pic shows the broken retainer.
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Old 11-09-2005, 11:52 PM
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Because this happened to me 3 times, I designed and custom manufactured a new retainer. I will have to post the specs some time.
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