2007 Expedition 4x4 switch does nothing...

[berriospa]

I have a 2007 Expedition with 86,000 miles. The 4x4 switch is dead, does nothing. I checked all the fuses and they're good. Checked the connector at the motor and its good. My question is has anyone encountered this problem? I want to ask before I go and purchase and replace the transfer case shift motor. I had the interior fuse box replaced and programed, not sure if that could have caused the issue. Any suggestions?

 

[Blksmk]

Mine hasn't worked in years I'm sure mines the actuator. They get rusted and dirty very easy.

 

[Roger Phillips]

I have a 2006-mine had stoped at one point—it was the vacuum line running to the actuator-pretty easy fix...I didn’t repair the old line-I ran a new line....

 

[berriospa]

Roger Phillips was your indicator on your dash Turing in prior to you replacing the vacuum line?

 

[JExpedition07]

IWE solenoid

 

[07navi]

I'm not familiar with these because I came from a straight axle Excursion but I would get those two red thick dealer repair manuals which are for that year. They are made for specific years and everything is in them.

 

[Adieu]

Does it tell you it does nothing? Or switch onscreen but not actually do anything?

Has it been this way a while / since you got it, or is this a new development?

But yeah could be the vacuum

 

[berriospa]

Adieu,

Nothing, no indicator on the dash and it doesn't shift into gear. No, its a new development, it was parked for over a year while I was in Korea. But I never had a need to use it since I got back until now and its not working.

 

[berriospa]

Does it tell you it does nothing? Or switch onscreen but not actually do anything?

Has it been this way a while / since you got it, or is this a new development?

But yeah could be the vacuum

Nothing, no indicator on the dash and it doesn't shift into gear. No, its a new development, it was parked for over a year while I was in Korea. But I never had a need to use it since I got back until now and its not working.

 

[Eric Wheeler]

does anyone have a picture of where this is located. I did a scan with forscan and have this code c1979. 2016 expy. not giving a indicator on the dash. But when I turn the 4x4 switch it seems to work. I can clear the DTC then throw the switch and it come back. Thanks for any help with this.

 

[Eric Wheeler]

Code: C1979 - IWE Solenoid Circuit Failure

Additional Fault Symptom:
- Circuit Open

Status:
- DTC Present at Time of Request
- Malfunction Indicator Lamp is Off for this DTC

Module: Transfer Case Control Module

 

[Eric Wheeler]

I found the location and ordered the solenoid and check valve assembly. So hopefully this fixes the issue.

 

[Eric Wheeler]

Replaced with new parts and it fixed the C1979 code issue. $63 bucks and a trip to the parts counter. GTG.

 

[07navi]

Replaced with new parts and it fixed the C1979 code issue. $63 bucks and a trip to the parts counter. GTG.

Those were a big problem with the earlier pickups etc, but they are easy to diagnose. My Excursion never threw a code when they went out either. The Superduties etc wheel locks were much different but they used a part much like that. These IWE's are 10 times easier to work on.