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Old 02-24-2016, 12:37 PM   #11
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I don't know about the F150 but my F350 has three different settings in the DIC that allows for light, medium and heavy trailers. Mine was on light and after moving to heavy I can lock up the wheels on 7 setting.
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Old 02-24-2016, 12:50 PM   #12
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I posed a question several months ago about my 2015 F-150, and never seemed to get any replies. So this might be a good start to seek some help, not to steal the thunder from OP.


My issue is regardless of what the gain is set to, the "output" to the trailer, is never more than 1 bar (Occasionally when I am stopped, and I press the pedal hard I can get a second bar to illuminate).


So the problem is, when I am trying to slow down, particularly if I am going down a hill, the truck will shift down dramatically. For example, I was going 45 mph toward a traffic signal, down hill (not steep, but it was down), and the truck went from 5th gear to 2nd gear. It is alarming when the truck drops to 2nd at that speed, and the rpm jumps up. Not to mention it is a little embarrassing when the engine is screaming down the hill.


Additionally, I have reached the point where every time I have to slow/stop I have to use the lever on the controller. If I don't, the truck down shifts and I go through the same thing. What is the point if I have to manually apply the trailer brakes with the lever, every single time? If I'm slowing to make a turn, I would kind of like to have 2 hands available to work the steering wheel and turn signal and all of that.


I never had anything like that happen in my 2013 F-150. It never down shifted, and I never had to apply the brakes with the lever. Same trailer, only difference is with the truck. We traded trucks mid season, so it wasn't a situation where it worked with the '13, and then over the winter we made the trade, and then it "didn't work" with the '15. The change from "working" to "not working" happened over a period of about 3 weeks mid season.


My personal opinion, and I am not a mechanic in any way, is that the truck is sensing the trailer brakes are not being applied (or atleast not applied enough, which goes back to my previous statement about the "output" lights not being more than 1 and occasionally 2 out, if I remember correctly, 6), and it over compensates with engine brake by down shifting. As I said, it is startling when it dramatically downshifts. It has even down shifted to 1st from 4th. I am under the impression down shifting to first is never a good thing. I remember when I drove a manual transmission, the only time I put it in first was if I was standing still.


Apologies for hijacking this thread, just curious if anyone has any suggestions. I will be having the trailer brakes and the wheel bearings serviced in the next month or so, so any suggestions are appreciated
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Old 02-24-2016, 01:01 PM   #13
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Quote:
Originally Posted by CWSWine View Post
I don't know about the F150 but my F350 has three different settings in the DIC that allows for light, medium and heavy trailers. Mine was on light and after moving to heavy I can lock up the wheels on 7 setting.
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Old 02-24-2016, 01:07 PM   #14
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I also have a 2015 F150 and the factory controller will not lock up the trailer, although I can feel the the trailer brakes working.
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Old 02-24-2016, 01:19 PM   #15
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X2 with ksmith954, my 2012 would not lock the wheels but brakes seem to work as needed. Are they definitely supposed to lock up?
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Old 02-24-2016, 01:44 PM   #16
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My F350 also will not lock up the brakes but will stop the trailer and truck very quickly just as if they were anti lock. Works quite well for my big 5er.
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Old 02-24-2016, 01:45 PM   #17
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X2 with ksmith954, my 2012 would not lock the wheels but brakes seem to work as needed. Are they definitely supposed to lock up?
My truck manual says to set them to lock then back off the setting. Depends if going to be a problem and how much braking the RV is really doing. Using the example of wet pavement and panic stop the truck will slow down faster than the RV and the RV will tend to come around and fish tail causing you to lose control. There really no way to know unless you can proper setup your controller.
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Old 02-24-2016, 01:46 PM   #18
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When you plug your RV into a Ford truck equipped with the intergraded brake controller it turns the trailer brakes into an anti lock system like your truck has. If I am not mistaken all
the domestic trucks (Ford, GM and FCA Ram) do the same. These intergraded systems are
also proportional to the amount of braking force applied to the truck.
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Old 02-24-2016, 01:49 PM   #19
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X3 I have a 2013 f150. The gain is set at 10 and I can definitely feel the trailer brakes engage but they don't lock up. I think that the truck manual said that this sometimes will happen. The question is if it is braking enough and how do you know?
I assume that "lock up" means that the trailer tires actually stop rotating.
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Old 02-24-2016, 02:03 PM   #20
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Originally Posted by furtrader View Post
When you plug your RV into a Ford truck equipped with the intergraded brake controller it turns the trailer brakes into an anti lock system like your truck has. If I am not mistaken all
the domestic trucks (Ford, GM and FCA Ram) do the same. These intergraded systems are
also proportional to the amount of braking force applied to the truck.
The way it was explained to me was what you are saying is true when you press on the brake peddle but if you activate the brakes using the brake controller they are not anti lock and should lockup the wheels.
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