This past weekend I drove a couple hundred miles in the rain/snow, parked, came out to about 6 inches of snow, went to flip it to 4hi and no go, no lights or nothing, tried 4lo nothing. Pulled it into the shop and started the heat, checked all the fuses, relays on saturday nothing, still didn't work. Truck sat outside on saturday night, sunday afternoon went to town, flipped the switch and the 4x4 worked, and did again today. I am in 4x quite often living in MN, so it can't be a no-use issue. I don't want to be needing 4x4 and not have it work so should I replace the IWE with the new version I've been reading about on previous posts? Where is this thing at? I'm a GM guy so this Ford stuff is foreign to me. Thanks!

 

the iwe solinoid is on the firewall on the passenger side beside the PCM and behind the battery. there is a connector and vacume lines on it. cant miss it

 

just had mine replaced today along with 2 vacuum checks, it was full of water and now the hub needs to be replaced since it wasnt holding vacuum and let the gear slip out and grind