4Wheel Drive not engaging
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4Wheel Drive not engaging
I have a 2001, 7.3 diesel F250 with shift on the fly, automatic hubs. The 4wheel is not engaging when I turn the switch to 4Wheel. It will not engage for 4wheel low as well. I crawled under to make sure that all electrical connections are tight. No problems were found there.
Any ideas where to start to troubleshoot?
Thanks guys.
Any ideas where to start to troubleshoot?
Thanks guys.
Post Fiend
Joined: Mar 2011
Posts: 10,080
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From: Backwoods of Snowflake AZ
I have a 2001, 7.3 diesel F250 with shift on the fly, automatic hubs. The 4wheel is not engaging when I turn the switch to 4Wheel. It will not engage for 4wheel low as well. I crawled under to make sure that all electrical connections are tight. No problems were found there.
Any ideas where to start to troubleshoot?
Thanks guys.
Any ideas where to start to troubleshoot?
Thanks guys.
I have never encountered this problem personally but I have once before heard that the vacum pump or something like that will go out and not engage it into 4x4. I have only heard of this on the shift on the fly. usually they have the auto manual hubs I know our truck does. I also have heard that they are vacum lines on these trucks and can break causing the truck not to lock into 4x4. Not sure on any of them don't qoute me on it. Hopefully, somebody will come along and see your posting and know for sure. Oh, and by the way our truck is a 2002 Ford F250 4x4 triton v10 same equipment.
Trav
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Get under the truck and have someone turn the 4x4 switch. See if you can hear the box beside the trans click. If it does, good. Look under the hood behind the passenger side battery, you will see the vac pump. Ckeck to see if you have vac at the pump. Follow the vac line to the 4x4 switch next to it. If you have vac going to the switch and no vac coming out of the switch, buy the switch. $60.00 at Ford
Senior User
Joined: Jan 2004
Posts: 247
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From: Helmville MT
I have a 2001, 7.3 diesel F250 with shift on the fly, automatic hubs. The 4wheel is not engaging when I turn the switch to 4Wheel. It will not engage for 4wheel low as well. I crawled under to make sure that all electrical connections are tight. No problems were found there.
Any ideas where to start to troubleshoot?
Thanks guys.
Any ideas where to start to troubleshoot?
Thanks guys.
Senior User
Joined: Jan 2004
Posts: 247
Likes: 0
From: Helmville MT
Then I would say if you are lucky it will be the relay. Unlucky, it will be the motor. My understanding is that the switch that activates the dash light has nothing to do with the actual hubs (vacuum) working.
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MTMike, it looks like I'm on the unlucky side of life today. Changed out 2 relays with no change. I guess that I'll change the actuator motor next. Sorry to show my ignorance, but is the actuator motor about half the size of a flashlight, attached to the transfer case and is under the crossmember?
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From: Helmville MT
I am not sure as when mine died I needed it fixed "right now" and I was not at home so I paid to have it done at the dealer - got it fixed the following day. But that sounds about right. I think the part at the dealer was about $450 and I think I checked Napa or someplace that had if for about 1/2 that. Good luck!!
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From: Mcdonough, GA
Caretaker,
Are the relays clicking? Have you checked all fuses? Before spending money on a motor that may not fix the problem get a meter or test light and check to see if your getting power to the motor. Someone here can surely help with fuse numbers and locations.
Are the relays clicking? Have you checked all fuses? Before spending money on a motor that may not fix the problem get a meter or test light and check to see if your getting power to the motor. Someone here can surely help with fuse numbers and locations.
Junior User
Joined: Nov 2011
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Before you spend money on the motor hit it with a dead blow hammer and see if that makes it work.
Remember the electric connections may be corroded clean them up and dielectric grease
This is a normal issue and usually this works but not always
At lease it could be a cheap fix
Remember the electric connections may be corroded clean them up and dielectric grease
This is a normal issue and usually this works but not always
At lease it could be a cheap fix
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