Need help From someone with working ESOF
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Senior User
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From: Plant City
Need help From someone with working ESOF
I am looking for someone to assist me with troubleshooting my ESOF system. I know the system but what I need is someone to tell me voltages to the transfer case motor. I need to know the voltages when shifted into 4h and then to 4L and in reverse back to 2wd. I also need to know the length of time the voltages are present. If anyone can help that would be great.
Cargo Master
Joined: May 2010
Posts: 3,047
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From: Snohomish, WA
Take a look at this document I put together to troubleshoot the system. You will need to do some reading, but I think what you are looking for is there.
ESOF Troubleshooting
ESOF Troubleshooting
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From: Plant City
Thanks that is very useful and will go in my collection of procedures. But the one I don't see is when in 4h and going to 2wd is there voltage present? Or in other words how does it go from 4h to 2wd?
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
2 Questions:
Can you hear the shift motor when trying to go from 4H to 2WD?
Have you tried moving the truck forward or back to see if it will go from 4H to 2WD?
If the X-fer case gears are slightly binding than the shift motor does not always have the power to disengage from 4H to 2WD.
Edit: 2000 ESOF Wiring Diagram
Can you hear the shift motor when trying to go from 4H to 2WD?
Have you tried moving the truck forward or back to see if it will go from 4H to 2WD?
If the X-fer case gears are slightly binding than the shift motor does not always have the power to disengage from 4H to 2WD.
Edit: 2000 ESOF Wiring Diagram
Thread Starter
|
Senior User
Joined: Oct 2009
Posts: 411
Likes: 1
From: Plant City
2 Questions:
Can you hear the shift motor when trying to go from 4H to 2WD?
Have you tried moving the truck forward or back to see if it will go from 4H to 2WD?
If the X-fer case gears are slightly binding than the shift motor does not always have the power to disengage from 4H to 2WD.
Edit: 2000 ESOF Wiring Diagram
Can you hear the shift motor when trying to go from 4H to 2WD?
Have you tried moving the truck forward or back to see if it will go from 4H to 2WD?
If the X-fer case gears are slightly binding than the shift motor does not always have the power to disengage from 4H to 2WD.
Edit: 2000 ESOF Wiring Diagram
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
This is the contact arrangement.
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Senior User
Joined: Oct 2009
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From: Plant City
Yes I had two good ones and I also ohmed out the wires to the Xfer case. Unfortunately I believe it to be my gem unless it has a control module/sensor behind the glove box however I am unable to find it.
P.s. thanks everyone for the help.
P.s. thanks everyone for the help.
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Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
The 2002 & 2003 have a separate 4WD control module.
The 2 good ones were exact replacements with the normally closed contact 87a.
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From: Plant City
Yep strait from the blue oval man himself. Now some time ago I had to replace my gem and bought one from the Internet. I gave him the vin numbers to match it I could of got a non 4x4? I do still have the old one I might try putting it back on. What do you think?
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