ESOF 4x4 not working - Ford Truck Enthusiasts Forums

Notices
6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

ESOF 4x4 not working

 
  #1  
Old 12-23-2017, 03:24 PM
sullyt28's Avatar
sullyt28
sullyt28 is offline
Senior User
Thread Starter
Join Date: Jul 2010
Location: Alliston, Ontario
Posts: 186
sullyt28 is starting off with a positive reputation.
ESOF 4x4 not working

'O5 4x4 stopped working checked all fuses all ok. I can't find anything in the Manuel on what relays are under the hood are for the esof. If anyOne knows which relays they are or to check it would be greatly appreciated.

Thanks in advance.
 
  #2  
Old 12-23-2017, 03:44 PM
00t444e's Avatar
00t444e
00t444e is offline
Posting Guru
Join Date: May 2017
Location: Southern OH
Posts: 1,293
00t444e is gaining momentum as a positive member of FTE.00t444e is gaining momentum as a positive member of FTE.
What part of it isn't working? Do the 4x4 lights come on? Have you tried locking the hubs?
 
  #3  
Old 12-23-2017, 06:15 PM
Yahiko's Avatar
Yahiko
Yahiko is offline
FTE Chapter Leader
Join Date: Apr 2012
Location: Spanaway
Posts: 22,353
Yahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputation
The fuses and relays will be in this PDF.

When I have some time to get to my computer I can post the
ESOF diagnostics and pin point testing for your year.
 
  #4  
Old 12-23-2017, 06:38 PM
sullyt28's Avatar
sullyt28
sullyt28 is offline
Senior User
Thread Starter
Join Date: Jul 2010
Location: Alliston, Ontario
Posts: 186
sullyt28 is starting off with a positive reputation.
Looks like itís in Aux box 3 I read on one thread that you should be able to switch the relays. One controls the on and the other the off to see if thatís the source of the issue. The 4x4 light works on the dash when the keys first turned and it doesnít appear to be hub related tried both locked and unlocked. Havenít crawled under to check for power at the connector hoping to try this first. From what Iíve read this is the most common problem - relay.

Any idea where aux 3 is located thinking itís under the fuse box under the hood.

really appreciate the help fellas.
 
  #5  
Old 12-23-2017, 06:46 PM
Yahiko's Avatar
Yahiko
Yahiko is offline
FTE Chapter Leader
Join Date: Apr 2012
Location: Spanaway
Posts: 22,353
Yahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputation
Look in the PDF I just posted and you will find that box up by the driver side battery.
 
  #6  
Old 12-23-2017, 08:17 PM
sullyt28's Avatar
sullyt28
sullyt28 is offline
Senior User
Thread Starter
Join Date: Jul 2010
Location: Alliston, Ontario
Posts: 186
sullyt28 is starting off with a positive reputation.
Originally Posted by Yahiko View Post
Look in the PDF I just posted and you will find that box up by the driver side battery.
f
Switched the relays at the battery box didnít do anything. Thought the mouse nest in there might have been the problem luckily no damage done. Next step is to check the couple at the TC I guess.
 
  #7  
Old 12-23-2017, 09:08 PM
Yahiko's Avatar
Yahiko
Yahiko is offline
FTE Chapter Leader
Join Date: Apr 2012
Location: Spanaway
Posts: 22,353
Yahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputation
Here is that other PDF.
 
  #8  
Old 12-23-2017, 09:35 PM
DSMMH's Avatar
DSMMH
DSMMH is offline
Posting Guru
Join Date: Jun 2006
Posts: 1,414
DSMMH has a great reputation on FTE.DSMMH has a great reputation on FTE.DSMMH has a great reputation on FTE.DSMMH has a great reputation on FTE.DSMMH has a great reputation on FTE.DSMMH has a great reputation on FTE.
Just had this happen. My fix was to replace the two under the hood relays. Here are some suggestions.

Pull the two ESOF relays. Go into the power panel under the steering column and find a relay that you know works. Substitute each of the ESOF relays for the known good relay, to see which one is bad.

If that does not work, remove the dash switch. It is the next weak link. Take it apart. Be careful not to loose the spring and ball bearing. Clean the three rotating contacts and the circuit board ribbons. Put some dielectric grease on the contacts and reassemble.

Next, check the ESOF select valve. This applies vacuum to the hubs. It is above the vacuum pump. OBTW check that the vacuum pump is operating.

Again, relay contacts pit and burn over time, depending on frequency of use and current being carried. They use to be repairable, but the new design does not allow that for obvious reasons. The only option is to take it apart and spray some contact cleaner on the contacts. This may remove some of the burnt contact residue but will not remove the putting.

Ed
 
  #9  
Old 12-25-2017, 07:55 PM
07ps350
07ps350 is offline
New User
Join Date: Dec 2017
Posts: 1
07ps350 is starting off with a positive reputation.
I have the same problem right now. 4wd was working a couple days ago now just doesnt do anything. Im suspecting falty motor as i have swapped the two relays and still nothing, (unless both those relays are bad i have not checked them with a multimeter yet) and the 4x4 lights come on when i start the truck.
 
  #10  
Old 12-27-2017, 07:02 PM
sullyt28's Avatar
sullyt28
sullyt28 is offline
Senior User
Thread Starter
Join Date: Jul 2010
Location: Alliston, Ontario
Posts: 186
sullyt28 is starting off with a positive reputation.
Itís been -20c here last couple days so I havenít been a able to work on it. Little frustrating 4wd was working fine couple weeks ago and now nothing - same symptoms.

curious if the forscan would pick up any codes ?

please post what you find. Thank you
 
  #11  
Old 12-27-2017, 07:08 PM
FiznUKa's Avatar
FiznUKa
FiznUKa is offline
Posting Guru
Join Date: Mar 2014
Location: Salt Lake City, utah
Posts: 1,455
FiznUKa has a very good reputation on FTE.FiznUKa has a very good reputation on FTE.FiznUKa has a very good reputation on FTE.FiznUKa has a very good reputation on FTE.
ForScan will read the codes.
 
  #12  
Old 12-27-2017, 07:10 PM
tfunk88
tfunk88 is offline
Elder User
Join Date: May 2010
Location: West by God Virginyuh
Posts: 612
tfunk88 is gaining momentum as a positive member of FTE.
Originally Posted by sullyt28 View Post
Looks like itís in Aux box 3 I read on one thread that you should be able to switch the relays. One controls the on and the other the off to see if thatís the source of the issue. The 4x4 light works on the dash when the keys first turned and it doesnít appear to be hub related tried both locked and unlocked. Havenít crawled under to check for power at the connector hoping to try this first. From what Iíve read this is the most common problem - relay.

Any idea where aux 3 is located thinking itís under the fuse box under the hood.

really appreciate the help fellas.
So just to clarify...the 4x4 light comes on when you turn the key on, but does not come on when you flip ESOF switch?
 
  #13  
Old 12-28-2017, 04:24 AM
Yahiko's Avatar
Yahiko
Yahiko is offline
FTE Chapter Leader
Join Date: Apr 2012
Location: Spanaway
Posts: 22,353
Yahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputationYahiko has a superb reputation
Did you read the pinpoint testing PDF I posted?
 
  #14  
Old 01-01-2018, 02:48 PM
VictorwithaC
VictorwithaC is offline
Senior User
Join Date: Jul 2016
Posts: 457
VictorwithaC is starting off with a positive reputation.
The pdfs that Yahiko posted will tell you how to troubleshoot but if you dont understand them I did it step by step with photos when mine **** the bed. If you follow my thread you should be able to see if the electrical side is good.
https://www.ford-trucks.com/forums/1516220-conclusion-to-wont-come-out-of-4x4.html
 
  #15  
Old 01-20-2018, 03:24 PM
sullyt28's Avatar
sullyt28
sullyt28 is offline
Senior User
Thread Starter
Join Date: Jul 2010
Location: Alliston, Ontario
Posts: 186
sullyt28 is starting off with a positive reputation.
Really appreciate the help. Finally got warm enough to look at the truck again, I ran the Forscan and got P1812 and P1876. The trouble shoot guide has me starting with the solenoid on the passenger side. I'm trying to get ohm readings either my voltage meter sucks or I'm doing something wrong. Anyway hoping some of these DTCs could short cut what might be the issue. Just to clarify, the lights come up on KO, 4 wheel drive won't engage can't hear anything happening under the hood. I have the manual hubs there locked, tried rolling both 4H and 4L and nothing. I use 4WD all the time just stopped working out of the blue.











Great info on that previous thread I'm going to work my way through it and see if it will tell me anything. Cheers.
 

Thread Tools
Search this Thread
Quick Reply: ESOF 4x4 not working


Contact Us About Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.