Trailer brake issues
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Trailer brake issues
I have a 2016 f450 6.7 and I lost trailer brakes today I have power to everything but the brakes I have check all fuses under the hood and in the cab. The truck doesn't have a trailer brake module that is visible guess it's built. I did have trailer brakes yesterday. I been use a meter to check the plug and fuses but just can't figure out why I don't have power to the trailer brakes. What am I missing
Posting Guru
Joined: Mar 2018
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From: Fairbanks, AK
Have you been experiencing any other intermittent electrical issues? I'd check the truck's wiring harness connectors from harness to the trailer plug. Disconnect, check for moisture, signs of shorting, or anything else suspicious.
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everthing works coming out the plug only lost the middle pin for the trailer brakes I did pull the plug apart to make sure the wire was still hooked up. At first I thought I blew a fuse but check every fuse that had to do with the trailer and all good I did check the plug that hooks to brake in the cab and all seem good I didn't know if there is a inline fuse mybe
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Joined: Aug 2008
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From: Frederick, MD
this sounds to me like a few different things could be in play here.
First, did you get any notifications from the trailer brake controller on the screen that a trailer was disconnected?
Secondly you may have an issue with the 7 pin connector at the back of the truck or trailer.
First, did you get any notifications from the trailer brake controller on the screen that a trailer was disconnected?
Secondly you may have an issue with the 7 pin connector at the back of the truck or trailer.
Laughing Gas
Joined: Mar 2018
Posts: 1,244
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From: South Central Indiana
If the integrated TBC is not giving you any messages the problem usually lies with the trailer. You didn't by chance turn the gain to zero? Sorry, had to ask.
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New User
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there is no manual brake module and the dash never said anything about tailer being discounted I took my meter and check the pins on the truck without the trailer and got nothing from the trailer brake pin everything else works turn signals running lights and brake lights I hook the trail to another truck and the brakes fine on that. I'm going to dig deeper tomorrow and make sure I have power to the trailer brake fuse not sure what less to do then start there
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New User
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no slider any where but I had trailers brakes two days ago i have a pito hitch and never had the trailer smack the hitch like it did today so that's why I started to check things out. It's the only truck I have that doesn't have a slide control the other 350 do but not on the 450
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Joined: Aug 2008
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From: Frederick, MD
Well I think that is the issue and reason for no trailer brakes.
To confirm with a trailer hooked up you should be able to scroll through the screens and see the trailer settings.
if there is nothing there then you need to purchase a TBC. They are plug and play but you would need someone to activate it in the pcm
To confirm with a trailer hooked up you should be able to scroll through the screens and see the trailer settings.
if there is nothing there then you need to purchase a TBC. They are plug and play but you would need someone to activate it in the pcm
Super Moderator
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From: Frederick, MD
so some additional info.
You can still have power to the 7 pin and 4 pin connectors if the fuses are in place.
But you cannot have brakes without the tbc unless the trailer has surge brakes.
You can still have power to the 7 pin and 4 pin connectors if the fuses are in place.
But you cannot have brakes without the tbc unless the trailer has surge brakes.
Elder User
Joined: Aug 2011
Posts: 858
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From: Chico,CA.
Well I think that is the issue and reason for no trailer brakes.
To confirm with a trailer hooked up you should be able to scroll through the screens and see the trailer settings.
if there is nothing there then you need to purchase a TBC. They are plug and play but you would need someone to activate it in the pcm
To confirm with a trailer hooked up you should be able to scroll through the screens and see the trailer settings.
if there is nothing there then you need to purchase a TBC. They are plug and play but you would need someone to activate it in the pcm
Senior User
Joined: Jan 2006
Posts: 224
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From: Central Massachusetts
What kind of trailer do you have?
Im thinking you pulled a wire off near the wheel or a broken wire someplace on the trailer end...could be a ground too. Thats saying if a multi meter checks out ok at the plug end.
Im thinking you pulled a wire off near the wheel or a broken wire someplace on the trailer end...could be a ground too. Thats saying if a multi meter checks out ok at the plug end.