The "serv 4wd" light came on a few months ago and with some time searching the internet I have found that there is a service bulletin pertaining to this; “TSB 03-001-07” which describes how to fix it. Basically two steps, replacing the actuator and the other is erasing and reprogramming the TIPM with new software. I took the truck into the dealer and of course it was $815.00 for them to fix it, $250 for the actuator and the rest in labor. I have located the actuator for $120.00 and I am capable of swapping them out but the reprogramming is beyond me. Is it possible to fix the problem with just replacing the actuator and leaving the TIPM alone? Or is there another way to get it reprogrammed with out having to take it to the dealer?

Any feed back is greatly appreciated.

 

replace the problem part and pull the main fuse or unhook the battery for 15min. That will reset the ecu.

 

Check the wire harness to the transfer case.

On mine, the wire harness connected to the transfer case was hanging down and sitting on the driveshaft which wore through the wires. I fixed the 3 wires that were broken, and all is working great now.
Thought you might want to know.

 

Any pix of this actuator??Inquiring minds would like too see.

 

I replaced the actuator and did not reprogram and it has worked just fine.

 

I get it now, thats the nuts and bolts behind the switch on the dash.Thanks for the pix! good job, glad it worked out.

 

because it probably reset itself due to the ecu prgraming style of "learning".
Just goes to show how much the dealers are theiving bastards.

 

I'm also having this problem. Where can I get this actuator for $120

 

E-bay i was looking for one a while back and found them on there for $120

 

Just google the part number and it will pull up a few sites that will offer direct OEM replacements. 52114387AE Actuator, Front Axle Disconnect (includes: gasket and pads)