just woundering if you found anything out iam having same problem after i replaced the tccm. i took mine to a mechanic shop to have it scanned and it said communication error or encoder error i cant remember know but any way the idiot that did it put my transfer case in 4 lo and cant get it out he said he didnt know how he even got there.so if anyone can help please i cant even drive my truck now.

 

Looks like this was a new user that hasn't posted for a long time so who knows what happened?

 

Ok, I'm back. Sorry, been busy with work. Snow is a coming and I received the transfer case electric motor today. Can't get one of the bolts out. It is hitting the flange around the drive shaft. So can this flange be taken apart? It has 6 bolts toward the front and then 6 screws on the back side. I will try to post a pic.

 

 

Got the new transfer case electric motor put on today and it did not work either. Will try to do the reset and see if that works.

 

my 2002 dodge durango 4wd sensor light is on. it goes into 4 wheel drive with no problem and runs just fine. is this just telling me that the oil needs to be change or what.

 

i am having the same problem. i can't get that bolt out. do I need to remove the drive shaft? if so, what is the best way to do it?

 

Ok, apologies for the "necrobump", but I am having issues with the 4WD Service light as well. Here's my situation:

After a week of heavy rains and frequent operation in and out of 4WD my 4WD Service light came on with no lights illuminated on the 2WD/4WD/4LO switch.

I first disconnected the battery and also checked the under-hood 20A fuse in the fuse/relay block just behind the battery. The 20A fuse was blown. I reconnected the battery and drove to the parts house to get oil (it needs a change) and a pack of fuses. I replaced the 20A fuse and started the truck. No service light and no lights on the 4WD selector switch. Fortunately, the truck is in 2WD right now.

So then I got under the truck and disconnected the harness to the TCCM. I also replaced the 20A fuse and started the truck. This time there are lights on the 4WD switch selector (indicates in 2WD). I inspected the fuse and it's good, not blown.

I got back under the truck to inspect the wires more closely, but didn't see any obvious abrasion. However, I need to get it on the lift to see more closely. I'm leaving the TCCM disconnected for now and have a new TCCM on order.

It's my opinion that it's either abraded wires causing a short/fault or the TCCM is kaput. I'd appreciate any help, guidance or suggestions! I'll give ten whole bucks (US via paypal) if anyone can help me diagnose the issue to success

And if someone can give me the pinout/wiring diagram on the three pin connector going into the TCCM, I'd appreciate that, too!

 

I'm updating this for the sake of posterity. I replaced the transfer case motor and the issue has been resolved.

 

That TCCM light is lit by the CTM when it (thinks it) isn't happy with what it gets from the TCCM system. I had your problem a couple months ago. TCCM and it's downstream systems were fine. I swapped out the CTM (from one on eBay, $70) and the problem went away.