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Old 08-12-2013, 08:16 PM
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4x4 not engaging

Truck had ESOF but hubs were replaced with warn manual hubs. No dash light or anything. All the fuses and relays test good. Was wondering if there is anyway to determine if it is the transfer case motor or the 4x4 actuator?
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Old 08-12-2013, 08:58 PM
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Could be a few things. Check the harness that goes into the transfer case. I know it will sometimes get loose and not signal correctly. Also a possibility of a GEM module, father in laws 01 350 had a GEM crap out and he lost his 4x4. Check for power at 4x4 switch? Any codes tripping? If you can get a scanner you can watch the position of the transfer case during different positions (2,4,4L). Good chance that a code will be tripped but no CEL light.


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Old 08-12-2013, 11:13 PM
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I would clean the connection at the transfer case motor like ^ said.
That has been my problem a couple times, especially if you have never cleaned it or do a lot of offroading.
Then check to see if there is power getting to the motor on the transfer case if that doesn't work.
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Old 08-13-2013, 05:54 AM
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the dash switch is good. I checked the T-case motor to make sure I didn't break any wires but didn't clean them. is there any special way to clean? use dielectric grease?
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Old 08-13-2013, 08:10 AM
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Di-electric grease will work. It'll help with a water resistant seal too. When you say switch is good. You mean you have power? Another thing with the switch is the switch itself could be out. Another thing the scanner could tell you is the 4x4 switch position. Last post of mine talking about the actuator I meant the contact plates in the transfer case. So with the scanner you could watch the state of the contact plates.


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Old 08-13-2013, 10:46 AM
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I took my switch and put in in my friends 03 and it shifts his truck thru 2,4,4l.
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Old 08-13-2013, 05:34 PM
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Try swapping transfer cases see what happens? If you have that easy access to test with. If yours works in his and his still doesn't work in yours. I'd almost be inclined to say GEM. Can try some pinpoint tests for the esof, but a code could narrow it down.


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Old 08-13-2013, 07:07 PM
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I dug up the pinpoint tests for the ESOF on the 01. Quick search on google merrited them.

Here is the Pinpoints

Wiring Diagrams for ESOF

GEM Removal and Installation

Maybe this can help you out. Cheers.
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Old 08-13-2013, 08:37 PM
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thank you for then links BSkopnik. Do you have to change the t-case fluid to swap the motors or actuators out?
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Old 08-13-2013, 09:00 PM
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Quote:
Originally Posted by agriffin View Post
thank you for then links BSkopnik. Do you have to change the t-case fluid to swap the motors or actuators out?
Nope. Just unbolt and pull off for the swap to test. Almost like a starter


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