Trailer Brake Controller: "Trailer Disconnected" - Ford Powerstroke Diesel Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 23 Old 05-21-2012, 04:09 PM Thread Starter
Member
 
Mustangnut6788's Avatar
 
Join Date: Dec 2011
Location: Painesville, OH
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Trailer Brake Controller: "Trailer Disconnected"

Hey guys I'm working on my 08 F-350 KR and when I plugged my 28' enclosed trailer up to it the electric brakes are giving me fits. The lights work fine, just the brakes are giving me fits. I'm almost positive that the trailer is ok since it worked fine on my F150 last year. I also had a friend over with his 06 F350 KR and his worked fine too. We both have the integrated brake controller on our trucks.

At first the brakes would work intermittently and would somewhat function but now they seldom come on. When I squeeze the override button the dash says "trailer disconnected".

I have done the basic things like clean all the contacts on both the truck and trailer plugs. I even took the plug off the harness on the truck and cleaned it up. The truck is from Texas so it doesn't have much corrosion at all. The trailer plug was new last summer and was greased up for the winter to prevent corrosion. I have redone the main ground wire on the trailer frame by grinding down to bare metal and installing a new ring terminal. Still no luck so I'm beginning to think its in the truck side of things.

Has anyone experienced this problem or have any recommendations on how to troubleshoot or diagnosis this?

Thanks for the help guys.

Nate

2008 F-350 King Ranch
2 - 91 Mustang's
Mustangnut6788 is offline  
post #2 of 23 Old 05-21-2012, 04:46 PM
Compression Ignition Addict
 
Clayton1985's Avatar
 
Join Date: Nov 2010
Location: Fort St John, BC
Posts: 1,757
Thanks: 2
Thanked 12 Times in 8 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Had a similar issue. Check the fuse my man!

2008 Job 3, F350, 6.4/drw/lariat/CC/LB, Spartan, Viper 5902, Line-X, Flo-pro egr delete, aFe stage 2 proguard 7, MBRP Cool Duals/downpipe/CAC, CCV mod, coolant filter PMF 7" 4link, Rigid Dually fogs, Royalty Core 3pc, Crown brake lines, Mishimoto Rad
6.4 Rebuild May/2015, BD manifolds+Uppipes, chromoly rods, rockers,lifters, hd springs
Monstir 20", 37x12.50 ATZ P3
1999 Corvette Cpe
Clayton1985 is offline  
post #3 of 23 Old 05-21-2012, 04:51 PM
Compression Ignition Addict
 
rocknmj's Avatar
 
Join Date: Feb 2010
Posts: 264
Thanks: 17
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Mine will do it occasionally with my GN. Seems that I have to really push the trailer plug in hard. Even after it seats far enough to engage the lock I have to give it a little more otherwise I'll get the on-and-off "trailer disconnected" message. I've been meaning to swap out my trailer plug but haven't got it done yet. Would be interested to know if it ends up being the truck side.


Sent from my Autoguide iPhone app



2008 Lariat 4x4 CCLB DRW
H&S Mini, S&B Intake
AirDog 2, Beans Diesel Sump
DieselSite Coolant Filter, CAC Boots, Tranny Filter

rocknmj is offline  
post #4 of 23 Old 05-21-2012, 05:24 PM Thread Starter
Member
 
Mustangnut6788's Avatar
 
Join Date: Dec 2011
Location: Painesville, OH
Posts: 67
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Clayton, do you know what fuse to look for? Is it under the hood or pass side kick panel?

2008 F-350 King Ranch
2 - 91 Mustang's
Mustangnut6788 is offline  
post #5 of 23 Old 05-21-2012, 05:47 PM
Compression Ignition Addict
 
Clayton1985's Avatar
 
Join Date: Nov 2010
Location: Fort St John, BC
Posts: 1,757
Thanks: 2
Thanked 12 Times in 8 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I cant recall.


Actually, im pretty sure its under the hood now that I think about it.

2008 Job 3, F350, 6.4/drw/lariat/CC/LB, Spartan, Viper 5902, Line-X, Flo-pro egr delete, aFe stage 2 proguard 7, MBRP Cool Duals/downpipe/CAC, CCV mod, coolant filter PMF 7" 4link, Rigid Dually fogs, Royalty Core 3pc, Crown brake lines, Mishimoto Rad
6.4 Rebuild May/2015, BD manifolds+Uppipes, chromoly rods, rockers,lifters, hd springs
Monstir 20", 37x12.50 ATZ P3
1999 Corvette Cpe
Clayton1985 is offline  
post #6 of 23 Old 05-21-2012, 05:51 PM
Compression Ignition Addict
 
NCfarmboy's Avatar
 
Join Date: Jan 2009
Location: Charlotte
Posts: 391
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Let me know where it is and what you find...having a similar issue

2014 F-250 KR<><

SCT - Rudys Tunes - Deleted
NCfarmboy is offline  
post #7 of 23 Old 05-21-2012, 09:09 PM
Compression Ignition Addict
 
44magnum's Avatar
 
Join Date: Apr 2010
Location: San antonio TX
Posts: 1,276
Thanks: 1
Thanked 5 Times in 5 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Push the plug in REALLY REALLY hard. I went through the exact same thing. I even had a friend test the plug on the truck, when he just stuck it in (like any sane person would) it would have problems but when he shoved it in really hard it worked great. Doesn't make much sense to me but I haven't had any trouble since I started REALLY pushing the plug in.

2008 (Job 1) F250 King ranch 4x4, snow plow prep package with 2.5 level. Black Maxx, B&W Diehard platinums. Dieselsite coolant and transmission filters, NCU Motorsports/amsoil oil bypass kit. Turbo blankets, 5.5 PMF traction
Please collect and message me Shell, Rotella oil cap codes aka "my miles matter" I'm trying to save up for a hat or something.
44magnum is offline  
post #8 of 23 Old 05-21-2012, 09:56 PM
Super Moderator


 
SuperCrutyPS's Avatar
 
Join Date: Jul 2008
Location: Orangevale, CA
Posts: 15,151
Thanks: 82
Thanked 477 Times in 461 Posts
Mentioned: 3 Post(s)
Quoted: 240 Post(s)
Garage
Feedback Score: 0 reviews
Could there be a ground issue? If the circuit is not completing, I think it would give the Trailer Disconnected error. Maybe check under your truck in the back by the plug to see if the ground wire is attached. just throwing it out.


Owner | Operator: Darryl
My Truck Garage: Ol' Guy
Tow Toy Garage : Pilgrim International 31RE3SLF5
United States Navy - IC2 - '76-'80
SuperCrutyPS is offline  
post #9 of 23 Old 05-21-2012, 10:00 PM
Compression Ignition Addict
 
510guy's Avatar
 
Join Date: May 2010
Location: coquitlam bc
Posts: 421
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
i had to get a small screwdriver and bend the contacts inside the trailer plug on one of my work trailers to get it to work. the lights all worked fine but intermittently i had no brakes and given the road i was on i stopped at a brake check and got them working.

2006 F350 Crew Cab Dually 6.0 PSD 6 spd, ARP, IPR Gen 2 with up pipe, BD Diesel boot kit with metal cold side intercooler tube
2008 f350 Reg cab SRW flat deck 5.4l for work
510guy is offline  
post #10 of 23 Old 05-22-2012, 03:24 AM
Compression Ignition Addict
 
kevinah's Avatar
 
Join Date: Nov 2010
Posts: 289
Thanks: 12
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
I had the same issue, it was the ground on the trailer. I then had a problem as a result of the ground problem, the fuse blew on the truck- the one under the hood.


Sent from my Autoguide iPhone app
kevinah is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome