Weird stuff. Maybe electrical. 2007 - Hemi Truck Club
 
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Old 02-07-2017, 06:12 PM   #1
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Weird stuff. Maybe electrical. 2007

This is new. Was driving along in the mountains and it was cold, snowy and icy. Put it in 4wd (I think), and was driving along, when out of the blue my stereo rebooted itself twice and my "serv 4wd" light came on. Since that time the radio's been okay, but no 4 wheel drive. Says it's in, or will sometimes flash on and off, but won't go. It even flashed when set to 2wd for a while. So, I'm seeing all these posts about the TIPM and the front actuator going bad. Do you all think it could be that. I've yet to see anyone have intermittent radio because of that, and not sure why both things would happen together. I also cannot find any information on how to determine if the FAD is good or bad.

Thanks!

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Old 02-08-2017, 12:21 AM   #2
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My first guess would be bad grounds. How does the battery look? Maybe check it charging and then again after sitting for a few hours.
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Old 02-08-2017, 03:40 PM   #3
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The grounds I can see appear tight, and the battery is new. But I will double check them. The weather hasn't let me do anything for a couple days, and then I'm on call till Monday. But early next week is diagnosis and decision time.
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Old 02-08-2017, 03:52 PM   #4
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I have researched this online for hours, and apparently what happens is, the TIPM sends erratic control signals to the Front Axle Disconnect actuator, usually after a 4wd mode is selected. Sometimes the mode sensor overtravels due to wear inside the transfer case also, which can possibly cause the same thing. At any rate, due to a short either in the FAD or related wiring, the TIPM fails, creating either a momentary (as in my case) or permanent surge condition, which can cause lights to not work, radio to kick off and on, wipers to quit, etc. In some cases the vehicle will not restart. But, from what I gather, the only real fix is to replace the TIPM and the FAD at the same time, and have the new module flashed with all the vehicle options. Probably a good idea to check the transfer case and sensor to see if there is any overtravel there, and do the repair on that at the same time. This problem is way more common than I realized (I knew nothing about the issue before this happened to me, but after researching it, it's happening to MANY different Chrysler products). If I end up doing the bulk of this myself, I will fuse the FAD circuit somehow. I would like to find some help on how to test the FAD actuator, and the transfer case motor.
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Old 03-09-2017, 05:57 PM   #5
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It's fixed now, and they covered it under the lifetime warranty (mostly). There was some bad wiring somewhere between the TIPM and the transfer case motor, which they fixed. That was what cost me, as wiring is not covered. But they also replaced the transfer case motor and replaced the bearing plate inside the TC, which there is a TSB on. Works fine now.
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Old 03-09-2017, 09:08 PM   #6
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