2005 TBC...no trailer brake power until over 10mph - Page 2 - Ford Powerstroke Diesel Forum
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post #11 of 52 Old 05-29-2019, 09:18 AM
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@HeavyAssault come save me, I'm all worked up!!!!
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So says the internet... ...and so it shall be.
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OK, thanks for the info. To show my ignorance, what is the problem with 3 nipples...
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post #12 of 52 Old 05-29-2019, 09:24 AM
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lucky me
my 6000 lbs boat uses surge brakes lol

and Heavy does not get "worked up" he is always like this
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post #13 of 52 Old 05-29-2019, 09:31 AM Thread Starter
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lucky me
my 6000 lbs boat uses surge brakes lol

and Heavy does not get "worked up" he is always like this
Yeah....mine had surge brakes but they were horrible. I swapped them out for electric brakes.....stops much better (when the TBC gives them power).

Pulling the boat doesn't bother me as much....it's light enough to stop even without trailer brakes. The camper is what bothers me....the campsites in my area are pretty hilly......it's not fun to stop when you don't have trailer brakes under 15mpg. I'm surprised they actually designed it to function like that....what would Ford's reasoning be??

And yes.....I've figured out that he's always like that.

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post #14 of 52 Old 05-29-2019, 09:32 AM
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so the manaul activation does not work " or is reduced " also

ford did really screw up on this reduced voltage IMO i wonder if there is a hack ?

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post #15 of 52 Old 05-29-2019, 09:40 AM Thread Starter
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As far as I can tell.....when you manually activate them, you have no brakes at all. Does the system put out half a volt or some other minute about of voltage? Maybe......but half a volt might as well be zero volts. When I first bought the truck I actually thought the TBC was faulty because when I hooked my trailer up and manually worked the brakes ..nothing happened. But then when I would get out on the road, they started working.

I would understand if the automatic function (just using the brake pedal) would reduce volts at slow speeds.......as long as you still had full power if you manually actuated them......but you have next to zero braking power.....even though the controller shows full green bars (power output).

Yes, a fix/hack would be nice. Even at 10mph.....if you are pulling a heavy load and need to stop quick, the fact that you can't get power to the trailer brakes is insane......

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post #16 of 52 Old 05-29-2019, 10:20 AM
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it takes a special tester to check the Ford reduced TBC output ans it had failed many roadside safety inspections because the inspectors did not know about this "better idea"
Bismic may have posted the pdf for that ?

i like the integration of the TBC but if i used the e trailer brakes I would probably piggyback a manual full volt slider

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post #17 of 52 Old 05-29-2019, 10:32 AM Thread Starter
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it takes a special tester to check the Ford reduced TBC output ans it had failed many roadside safety inspections because the inspectors did not know about this "better idea"
Bismic may have posted the pdf for that ?

i like the integration of the TBC but if i used the e trailer brakes I would probably piggyback a manual full volt slider
I've thought about trying to bypass the OEM TBC and install an aftermarket one......but I'm just wondering how easy that would be to do since the factory TBC is tied into the trucks computer. Other than the "no brakes under 10mph" issue....the factory TBC actually works great! It's nice and smooth, and I don't constantly have to tinker with it like I have to with most aftermarket ones I've used. Sure would be nice to just figure out a way where I can still get braking power at slow speeds.

Did all the 03-07 factory TBC's do that "reduced braking power at slow speeds" thing....or just the 05's?

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post #18 of 52 Old 05-29-2019, 10:42 AM
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even the new trucks reduce voltage
05 was the first year



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post #19 of 52 Old 05-29-2019, 10:45 AM
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you will lose all the integration of the ITBC if you go standalone but it may be best for your needs ?

i think it is BS that you can't just flip the manual slider to straighten out a truck sliding on the road under the speed dictated by the tbc

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post #20 of 52 Old 05-29-2019, 10:46 AM Thread Starter
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I'm still trying to think of a reason why you would WANT to reduce trailer brake power and slow speeds. If your foot is light on the brake.....the trailer brakes should be on light. If you are heavy on the brakes, then trailer brakes should be on heavy.

Just because you are under 10-15mph doesn't mean that you don't need trailer brakes to help the truck stop. The logic there is very confusing......

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