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Open Roads Forum  >  Tow Vehicles

 > 2021 F-150 Brake Controller problems

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a-d-s

North Vancouver, BC

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Posted: 10/12/21 05:55pm Link  |  Quote  |  Print  |  Notify Moderator

Long version of what is going on for a bunch of us is here:
https://www.f150gen14.com/forum/threads/trailer-brake-not-working.3039/

Short version is that there is an intermittent issue with the TBC not working either at the start of the trip of randomly part way through. It's not the trailer as many of us have had them checked out thoroughly, and the issues are common.

Just wanted to get as much visibility to this problem and a potential solutions, other than Ford getting off their butts and figuring it out!

It's really frustrating as I love everything about this truck otherwise!


2021 F-150 HDPP EcoBoost
2016 Coleman 262BH
Reese Dual Cam - 1200lb

2112

Texas

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Posted: 10/13/21 07:14am Link  |  Quote  |  Print  |  Notify Moderator

All I can say is WOW

My 7 pin connector came loose a few times back when I was towing a 6000lb TT with my 1997 F150. I had no idea the trailer brakes were not working until I tried to use them. That made for a few hair raising moments of pure terror. I would pull over, reseat the connector and be on my way.

Fortunately, I haven't had any issues with my 2011 hauling the 9000lb FW. That would certainly be terrifying.

Note to self: Avoid trading up to a 2021 F150 at all cost


2011 Ford F-150 EcoBoost SuperCab Max Tow, 2084# Payload, 11,300# Tow,
Timbrens, PullRite SuperGlide 2700 15K
2013 KZ Durango 2857


Lynnmor

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Posted: 10/13/21 09:08am Link  |  Quote  |  Print  |  Notify Moderator

I didn't read the whole 15 pages, but it seems to me that there are those that did incomplete troubleshooting. There are more connections in the truck and trailer brakes than just at the bumper, and spreading grease is not a repair.





Grit dog

Black Diamond, WA

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Posted: 10/13/21 09:14am Link  |  Quote  |  Print  |  Notify Moderator

Lynnmor wrote:

I didn't read the whole 15 pages, but it seems to me that there are those that did incomplete troubleshooting. There are more connections in the truck and trailer brakes than just at the bumper, and spreading grease is not a repair.


Well since you're discounting the fact that the Fords could have an issue, I'm sure it's something other than the trucks. Maybe you should join their forum and tell them they're all full of ____...


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a-d-s

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Posted: 10/13/21 09:21am Link  |  Quote  |  Print  |  Notify Moderator

In terms of troubleshooting, my trailer (not that old, 2016) worked flawlessly with my old truck and Prodigy P3. As soon as I switched to the new truck I had problems. I assumed it was trailer/brakes related.

Took it to a trailer mechanic (not an RV shop), he had a once over everything, tested it and gave it a 100% clean bill of health. My 7 pin is in good shape. So that is what led me to it being a truck issue. Others on that forum have done similar exercises, and many have brand new trailers.

So while agree, much can go wrong in this "system" of truck/trailer, I am fairly confident it's the truck and some sort of software issue.

My hunch, unverified, is that the resistance threshold for the truck knowing a trailer is connected is too low. And it's bumping in and out of thinking the trailer is there or not.

BenK

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Posted: 10/13/21 11:47am Link  |  Quote  |  Print  |  Notify Moderator

Guessing that these fairly new 'highly integrated' OEM brake controllers are running in 'open loop' and the master/slave & it's lookup tables are a mess...not all the time, but occasionally gets into a state that the +100 computers get confused...ABS, traction control, sway control, engine/tranny computers, etc

Suggest to you all on that forum to consider a trial where one would install a P2, but leave all the OEM TBS wiring alone.

A dedicated trailer brake controller only deals with ONE external thing...the trailer brakes. Yes, it has inertia sensors, etc, but it is a standalone system NOT tied into the complex TV's systems.

Betcha the problem goes away


-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...

Grit dog

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Posted: 10/13/21 05:38pm Link  |  Quote  |  Print  |  Notify Moderator

BenK wrote:

Guessing that these fairly new 'highly integrated' OEM brake controllers are running in 'open loop' and the master/slave & it's lookup tables are a mess...not all the time, but occasionally gets into a state that the +100 computers get confused...ABS, traction control, sway control, engine/tranny computers, etc

Suggest to you all on that forum to consider a trial where one would install a P2, but leave all the OEM TBS wiring alone.

A dedicated trailer brake controller only deals with ONE external thing...the trailer brakes. Yes, it has inertia sensors, etc, but it is a standalone system NOT tied into the complex TV's systems.

Betcha the problem goes away


So ditch the fact that it has built in braking system? ****, that's one of the nicer features on my last several trucks that was not available just 10 years ago or so. I was really getting sick of putting a new brake controller in every truck! Bet I've installed/moved 10 controllers between personal rigs and installed close to 20 in my assigned company trucks. And who knows how many more in other work trucks.
Hell, I thought I died and went to heaven when they finally started pre-wiring them for brake controllers.

What you suggested is akin to "my power windows don't work right."
"Well that there new fangled stuff just aint worth a hill of beans. You should replace them with manual crank windows!"

MFL

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Posted: 10/14/21 05:45am Link  |  Quote  |  Print  |  Notify Moderator

I agree with Grit dog AGAIN! Maybe I'm just an agreeable guy!

I've also installed many brake controllers, in many vehicles. Prewired was great, actually did two complete installs, running all wiring. The IBC is a huge step up, most cases, with only a few issues on a certain brand early on.

The Ford IBC, in my opinion, is top of the heap, and should not be replaced as Ben is suggesting!

Note to Grit: If you plan on heaven, now would be a good time to start working toward that!!

Jerry





Brandon the Traveler

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Posted: 10/14/21 06:52am Link  |  Quote  |  Print  |  Notify Moderator

This issue with the 2021's is solved......sort of. Ford needs to change the brake controller module to a revised one, then reprogram the ECM and BCM. I say sort of because now the issue is Ford does not have the revised module and has no idea when they will have them available due to the chip shortage. They will probably make this low priority for trucks already sold when they can't get new trucks to market because of lack of hardware. They'll drag their butts and devote anything they can get to new sales until when this fiasco eases. One thing is certain and that is this chip thing won't be resolved until 2022 or possibly even 2023.

On a side note GM has brake controller issues with some of the new Silverados where they will not put out more than 7 volts. Same deal here, parts to rectify are not available.

Not really a time to buy new trucks, or a lot of other things. Some of these clown dealers are tacking on a $5K "market surcharge" to new trucks and its non negotiable, sticker + $5K. Go ahead and walk, they don't care because another sucker will come along and pay it.


I went.

Lynnmor

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Posted: 10/14/21 07:26am Link  |  Quote  |  Print  |  Notify Moderator

Grit dog wrote:

Maybe you should join their forum and tell them they're all full of ____...


Maybe you could just go away if you can't say something useful. Bringing a 15 page pile of nonsense to this forum, for you to defend, isn't worth anything.

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