Trailer disconnected
Thread Starter
|
Cross-Country
Joined: Mar 2009
Posts: 79
Likes: 0
From: S.W. Michigan
Trailer disconnected
My last 4 Ford trucks have not gotten along well with any trailer I’ve pulled
at current moment, every I slow down. Chimes and trailer disconnected loght
step on fuel and it magically connects
Anderson adjust alum hitch
at current moment, every I slow down. Chimes and trailer disconnected loght
step on fuel and it magically connects
Anderson adjust alum hitch
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
The most common reason ^^^^
Cargo Master
Joined: Feb 2004
Posts: 2,082
Likes: 175
From: Central Texas
Then it is not wired correctly. Even 4 way plugs have a dedicated ground circuit. A lot of people just don't hook them up because it will generally ground through the hitch.
Mountain Pass
Joined: Jun 2020
Posts: 248
Likes: 40
From: Texas
try your trailer lights out with just the trailer lights connected, don't connect the hitch.
If they don't work get a jumper cable and connect the vehicle frames together to see if they start working again.
Cargo Master
Joined: Apr 2021
Posts: 2,023
Likes: 756
From: Texas
its almost always a bad or loss of ground between trailer and truck and its almost always the trailer side. i have had the tbc since 06 in several fords and its always a ground issue. sometimes its hard to find and others jump out at you.
New User
Joined: Jan 2019
Posts: 9
Likes: 0
airbag light / trailer disconnected
I have had similar problems with my 2019 F250 in the last few weeks. Trailer connect / disconnect, Airbag light comes on when stopping, almost stopped, can't control windows, headlights come on etc. Finally got it into ford yesterday and there was a code that showed the "front display interface module". They ordered a new one and back in the shop on May 10th to replace it.
Trending Topics
Lead Driver
Joined: Oct 2014
Posts: 5,946
Likes: 1,359
From: NY/Canada border
Could be water intrusion/corrosion in the plug tucked up near the spare tire. When you step on the brakes to slow down, a situation is created. Been there, had one replaced. It also caused all kinds of other weird things with the window controls and stereo that you would not think related to that area of the truck.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Cargo Master
Joined: Aug 2010
Posts: 3,228
Likes: 64
Curt adapter for some of these problems especially for trailers with LED lights.
As far as ground My Super Duty has had ground through the harness since at least my 2011. And it was necessary since one of my trailer hitches used a teflon coated ball.
As far as ground My Super Duty has had ground through the harness since at least my 2011. And it was necessary since one of my trailer hitches used a teflon coated ball.
More Turbo
Joined: Mar 2018
Posts: 737
Likes: 13
I suspect the ground issue the OP's facing is on the trailer side, not the truck side. Having the ground connected to the 7/4 way pins on the truck doesn't necessarily mean the other end of the connector has been attached to the trailer's frame. My dad used to have an old, home built, utility trailer that he did all the wiring himself. And this is something that I could see him doing. I remember his 4 way plug only having 3 wires coming off it.
Cargo Master
Joined: Aug 2010
Posts: 3,228
Likes: 64
I suspect the ground issue the OP's facing is on the trailer side, not the truck side. Having the ground connected to the 7/4 way pins on the truck doesn't necessarily mean the other end of the connector has been attached to the trailer's frame. My dad used to have an old, home built, utility trailer that he did all the wiring himself. And this is something that I could see him doing. I remember his 4 way plug only having 3 wires coming off it.
Freshman User
Joined: Apr 2021
Posts: 29
Likes: 0
From: Southeast Michigan
This problem just started happening a couple of months ago with my truck. I thought it was the older plug on the trailer, but I'll go after the trailer grounds first. Thanks for the tips.
Thread
Thread Starter
Forum
Replies
Last Post
Pocketlint
1999 - 2016 Super Duty
6
Dec 2, 2016 07:13 PM