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Old 08-11-2007, 03:10 PM   #1
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Default 4wd won't engage - light keeps blinking

Having some trouble with 4wd. When I hit any of the buttons besides 2hi, the light just flashes continuously and will never engage. I don't have the "service 4wd" light illuminated on the dash, and otherwise the switch looks like it's acting normal. Any ideas? It's Autotrac, in case that makes a difference.
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Old 08-11-2007, 03:16 PM   #2
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can you pull codes from your transfer case control module??? It sounds like the encoder motor sensor or the shift module...idk
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Old 08-11-2007, 03:18 PM   #3
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I'll get back out there in a minute and see if I can pull any codes. I'm chillin on my American Standard right now
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Old 08-11-2007, 03:23 PM   #4
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Nope, no codes in the PCM.
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Old 08-11-2007, 03:25 PM   #5
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Ive had that problem a couple times before without the check 4wd light and a couple with it on. I took it to the dealer and they said they had to reflash the computer, and the other time they replaced a solenoid that went bad.
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Old 08-11-2007, 03:26 PM   #6
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I bet you have some in the transfer case control module. You know anyone with a scan tool that can check those codes???
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Old 08-11-2007, 10:10 PM   #7
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Is that different than a normal scan tool? I have EFILive to scan the PCM, not sure if I can get to the t-case module with that?
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Old 08-11-2007, 11:22 PM   #8
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Quote:
Originally Posted by thunder550
Is that different than a normal scan tool? I have EFILive to scan the PCM, not sure if I can get to the t-case module with that?

yes its different, you need to find a scan tool that will check the 4x4 system. I bet you have a C0327.
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Old 08-13-2007, 04:49 AM   #9
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Question - would low fluid in the front diff cause something like this?
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Old 08-13-2007, 10:03 AM   #10
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Ummmm, its not good, but I doubt it causes your problem. I am betting its your encoder motor sensor... but without pulling codes your kindof in the dark...
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Old 08-13-2007, 10:03 AM
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