2004 F-150 four wheel drive problems
Junior User
Joined: Dec 2007
Posts: 63
Likes: 0
From: Greenwald, MN
My 04' had the same problem. The IWE's are bad. I guess it is a know problem. When I brought mine in they switched them out with an updated part. If you do a search you will see a lot of threads on this topic.
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,606
Likes: 149
From: SE Georgia
when the IWE goes bad...or the vacuum pump fails
the front hubs fail engaged. so if it was an IWE problem, you would be in 4x4
check your fuses. I'm betting the relay that tells the IWE to break vacuum isn't working. You can also try taking the vacuum lines loose at the IWE themselves. if the hubs engage and 4x4 works, you know it's an electrical issue somewhere...most likely at the t-case
the front hubs fail engaged. so if it was an IWE problem, you would be in 4x4
check your fuses. I'm betting the relay that tells the IWE to break vacuum isn't working. You can also try taking the vacuum lines loose at the IWE themselves. if the hubs engage and 4x4 works, you know it's an electrical issue somewhere...most likely at the t-case
MMNC (SS)(Ret)
Joined: Mar 2004
Posts: 11,606
Likes: 149
From: SE Georgia
doubt it...system works pretty good with just a few hiccups here/there
remember those auto 4x4 hubs that were used from 92-96 F/E series? they had some issues also, but worked 99% of the time like our IWE do
remember those auto 4x4 hubs that were used from 92-96 F/E series? they had some issues also, but worked 99% of the time like our IWE do
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