Diagnosing Electronic locking differential
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Cargo Master
Joined: Dec 2005
Posts: 2,296
Likes: 11
From: freeland, mi
Diagnosing Electronic locking differential
2016 F250, Bought the truck last month and when you pull the **** to use the electronic locking differential it says check differential. Checked for power at the plug at the differential and I have none. I assume I should have 12 volts there. Fuse is good, appears to be a 15 amp fuse in spot 40 under hood per owners manual. Any one have a wiring diagram to trace back to see where the loss of power is? Or other ideas what to check. Did not find much via search.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
Well being that this truck was used, I would check the TCCM and if you have access to forscan make certain the feature wasn't disabled.
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Post Fiend
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Fleet Owner
Joined: Jan 2004
Posts: 26,007
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From: Brentwood,CA
I figured it was the same as the F150, because you can change ELD equipped or not with forscan.
Post Fiend
Joined: Nov 2001
Posts: 6,748
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From: Tallassee, ALabama
I suspect the ELD can be disable similar to the F150 but as far as I know, no one in the SD crowd has done it or had a reason to disable it. Also, the average used wouldn't disable it or even have the ability and for sure the tech at the dealership wouldn't in 99.9% of the time.
You seem to think the F150 all works for the SD trucks. Appears you own a F150 and not a SD? Might want to stick with info that verified and is known to work for the SD and not just toss out F150 info that has not been tried on the SD trucks.
You seem to think the F150 all works for the SD trucks. Appears you own a F150 and not a SD? Might want to stick with info that verified and is known to work for the SD and not just toss out F150 info that has not been tried on the SD trucks.
New User
Joined: Nov 2020
Posts: 1
Likes: 1
Thanks for the help.
Thanks for posting the wiring diagram. My truck started to display the dreaded check differential message. There is very little information on how to service the differential. I changed the fluid, needed to be done, but didn't help. After studying your diagram I checked the plug from axle to wire harness on the drivers side sort of above the shock. I found a wire that had chafed and worn through. Cleaned and soldered the wire and we are all fixed.
1st Gear
Joined: Nov 2024
Posts: 1
Likes: 0
Looking for the ELD solenoid
I have the same symptoms on my f350 SD diesel 2016 with the sterling rear end. The truck won't even start. The fail-to-start code is the TCM failed to respond. The actual diagnostic code is P1834 - Transfer Case Differential Lock-Up Solenoid Short Circuit To Battery. My theory is the short is causing the TCM to shut down to protect itself, but I unplugged the connecter at the diff for the ELD solenoid and used Forscan to run the TCCM test again and the fault came back with the same circuit as open, rather than short. Still no crank (unless I push the brake, then crank but no start.) Like the OP said, Forscan doesn't have and TCCM modules listed in the programming section, so I don't know if there is a way to tell the truck to ignore it. I can't find this solenoid anywhere, not even in diagrams. I've seen one on Ebay for a Dana 60, but not the Ford Sterling. Anyone have any thoughts or suggestions? Next step is to fully inspect the wires like the OP. I hope to get as lucky. 🤞
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arkiados
1987 - 1996 F150 & Larger F-Series Trucks
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Nov 29, 2022 08:31 AM