ESOF issues
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Trailering
Joined: Nov 2023
Posts: 21
Likes: 7
From: Tennessee
ESOF issues
Since I purchased the truck I have been doing with ESOF not working. Previous owner told me when I bought it that 4x4 did not work and his mechanic could not figure it out.
4x4 light in dash will not turn on, hubs will not lock, transfer case does not enter 4x4
So far I have:
-Replaced the vacuum pump (unrelated to 4x4 issue)
-Replaced axle vacuum seals when I did the hubs
-Verified that the vacuum lines are all good and was able to lock the hubs with a mighty vac.
-Checked voltage at ESOF switch and it is putting out 6.6v at 2WD, 3v at 4x4 HIGH and 1.3v at 4x4 LOW
-Pulled the transfer case electric motor and applied 12v to it and it is good and turns as it should
-Replaced 4x4 relays
Where would my next course of action be? I have read that it is likely the PCM at this point however before I am down hundreds of dollars to rebuild the PCM I would like to rule everything out.
4x4 light in dash will not turn on, hubs will not lock, transfer case does not enter 4x4
So far I have:
-Replaced the vacuum pump (unrelated to 4x4 issue)
-Replaced axle vacuum seals when I did the hubs
-Verified that the vacuum lines are all good and was able to lock the hubs with a mighty vac.
-Checked voltage at ESOF switch and it is putting out 6.6v at 2WD, 3v at 4x4 HIGH and 1.3v at 4x4 LOW
-Pulled the transfer case electric motor and applied 12v to it and it is good and turns as it should
-Replaced 4x4 relays
Where would my next course of action be? I have read that it is likely the PCM at this point however before I am down hundreds of dollars to rebuild the PCM I would like to rule everything out.
Cargo Master
Joined: Nov 2017
Posts: 3,110
Likes: 540
From: Rock Hill, SC
Also make sure that your transmission range sensor is spot on, with it's adjustment, There are alignment marks. My ESOF gave me grief, after I briefly borrowed the range sensor for another vehicle. When I installed it it was off by a MM, and the ESOF would not respond as it reads this input.
What about the ESOF pulse vacuum solenoid?
https://www.ford-trucks.com/forums/1...-location.html
https://www.ford-trucks.com/forums/1...ion-photo.html
What about the ESOF pulse vacuum solenoid?
https://www.ford-trucks.com/forums/1...-location.html
https://www.ford-trucks.com/forums/1...ion-photo.html
Fleet Mechanic
Joined: Mar 2023
Posts: 1,601
Likes: 943
Here's the solution to your problem (see link below)
https://wildhorsemfg.com/index.php/n...onversion-kit/
Get rid of the silly unreliable electronics and make it a stick in the floor. That way you're not asking the truck for permission to shift into 4x4, you’re damn telling it to shift into 4x4.
...
https://wildhorsemfg.com/index.php/n...onversion-kit/
Get rid of the silly unreliable electronics and make it a stick in the floor. That way you're not asking the truck for permission to shift into 4x4, you’re damn telling it to shift into 4x4.
...
Thread Starter
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Trailering
Joined: Nov 2023
Posts: 21
Likes: 7
From: Tennessee
Here's the solution to your problem (see link below)
https://wildhorsemfg.com/index.php/n...onversion-kit/
Get rid of the silly unreliable electronics and make it a stick in the floor. That way you're not asking the truck for permission to shift into 4x4, your damn telling it to shift into 4x4.
...
https://wildhorsemfg.com/index.php/n...onversion-kit/
Get rid of the silly unreliable electronics and make it a stick in the floor. That way you're not asking the truck for permission to shift into 4x4, your damn telling it to shift into 4x4.
...
Fleet Mechanic
Joined: Jan 2017
Posts: 1,667
Likes: 182
Here's the solution to your problem (see link below)
https://wildhorsemfg.com/index.php/n...onversion-kit/
Get rid of the silly unreliable electronics and make it a stick in the floor. That way you're not asking the truck for permission to shift into 4x4, your damn telling it to shift into 4x4.
...
https://wildhorsemfg.com/index.php/n...onversion-kit/
Get rid of the silly unreliable electronics and make it a stick in the floor. That way you're not asking the truck for permission to shift into 4x4, your damn telling it to shift into 4x4.
...
Fleet Mechanic
Joined: Mar 2023
Posts: 1,601
Likes: 943
But I also own a 2010 F250 that is still rocking a 273, so I ordered one of the Wildhorse manufacturing conversion kits for it.
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