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Open Roads Forum  >  Tow Vehicles

 > 2021 F-150 Brake Controller problems

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Grit dog

Black Diamond, WA

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

Lynnmor wrote:

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.


That wasn’t what I suggested…
If you can’t comprehend that apparently Ford has an issue with the brake controller function in some trucks then your commentary is not valid.


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Me Again

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Posted: 10/14/21 09:27am Link  |  Quote  |  Print  |  Notify Moderator

Brandon the Traveler wrote:

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.


Measuring IBC output with a volt meter no longer works with most modern controllers as they are variable pulse width signals they put out and not an uniform straight line DC Voltage that is varied.


2021 F150 2.7 Ecoboost - Summer Home 2017 Bighorn 3575el. Can Am Spyder RT-L Chrome, Kawasaki KRX1000. Retired and enjoying it!


Brandon the Traveler

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Posted: 10/14/21 10:20am Link  |  Quote  |  Print  |  Notify Moderator

Me Again wrote:

Brandon the Traveler wrote:

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.


Measuring IBC output with a volt meter no longer works with most modern controllers as they are variable pulse width signals they put out and not an uniform straight line DC Voltage that is varied.


Your point is? I don't care how the output is measured or what is used, it's a known issue with some new Silverados and GM has a TSB issued about it, but not the parts to fix it. 7 volts does next to nothing to a brake magnet. I doubt you see many owners of a new Silverado affected out in the driveway with a pulse modulation refractor, a nuclear densmometer,and a schwansoculator trying to diagnose the factory brake controller on a new truck with a BtoB warranty lol. [emoticon]


I went.

BenK

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Posted: 10/14/21 01:16pm Link  |  Quote  |  Print  |  Notify Moderator

Rube Goldberg like IMHO these IBC’s

PWM, sure it is great and a buzz word for decades…but…for a trailer brake system ?!? There is a lot of inductance in the run from the TV bumper plug to the brake magnet (even if the trailer has hydraulic/disc), PWM doesn’t make much sense other than to impress & bragging rights thereof…

If the IBS’s are PWM, then an oscilloscope will be needed and again why PWM ? A DMM won’t be able to read PWM above 10Hz, so it might read an RMS, but not true voltage output.

Maybe since highly integrated…the ABS system computers might need to have a PWM input in order to make their decisions, but another why make it so complex ?

Can see the why if that ABS is also highly integrated with a TV anti sway system, but the trailer brakes do NOT…can NOT respond that quickly…hysteresis is too large through it’s harness & magnets (have seen potential patents trying to make trailer, shoe/drum brakes have an ABS function…ditto that same white paper for trailers discs systems).

Didn’t go over to that F150 forum and that approx 15 page discussion on this issue and repeat for someone to test out a P2/P3 that bypasses the IBS.

If that works and is solid without whatever issues the IBS displays….nailed and low cost vs any OEM fix

Last checked P2’s were around $120-$150 bucks on sale (my P3 was stolen recently) and a few hours making up your own harness. ONly issue can think of is that if your dash ‘Tow/Haul’ button is on, the computer systems might get confused trying to talk to the IBS…and have a poop fit by tossing an error code…because the IBS answers…huh?


-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?...

Sjm9911

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Posted: 10/14/21 04:23pm Link  |  Quote  |  Print  |  Notify Moderator

My silverado has no problems, the controller works fine for me. Just watch the 2021 f 150s. Lots of other weird ellecteical stuff, i said this somewhere else before. Guy at work is in the process of lemon lawing one. Just hope its a fluke.


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Grit dog

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Posted: 10/15/21 05:50pm Link  |  Quote  |  Print  |  Notify Moderator

Sjm9911 wrote:

My silverado has no problems, the controller works fine for me. Just watch the 2021 f 150s. Lots of other weird ellecteical stuff, i said this somewhere else before. Guy at work is in the process of lemon lawing one. Just hope its a fluke.


Just part of the game with newer vehicles.
Except the electrical glitches are less “fixable” with wires and fuses and stuff.
Had 4- 2014 Silverados, identical half tons brand new, up in the Arctic. 2 had no issues. 1 had an issue that required re flashing something a couple times. The last one had a major electrical freak out and got drug onto the back of a winch truck and sent to town never to be seen again.
For the last 4 years I had a 2016 Silverado almost identical to the 2014s. It would have a random black screen on the touch screen and none of the radio/hvac controls would work, even the physical buttons and dials. Was bad once when I had the radio cranked up and then it went black, as I was on the road. So 30 minutes later that radio station was out of range and I had full volume static!
It would reset itself and work fine. Happened like 5 times maybe over a couple years.
Now, the new Silverado once in a while will change the phone volume on car play to full volume. And sometimes can’t think fast enough to change radio stations with the touch screen or steering wheel controls. But the tuner knob still works when this happens.
Knock on wood, both 2016 FCA personal vehicles have had no electrical glitches.

Although through the 10 or so trucks I’ve had with IBCs over the last decade, none have had IBC issues. From all of the big 3.

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