The following is a post I made on this subject. The post is in the Tow Vehicle and Diesel Digest section.
If you have already or are thinking of buying a Ford with the integrated brake control read the owners manual. My 2007 F-350 states it will not work with electric over hydraulic brakes. My Ford dealer was very proactive on this subject (summer 2007) at that time Ford advised they had NO PLANS to make their integrated brake control so it works with electric over hydraulic brakes.
I can imagine what you are thinking, another story about the Ford integrated brake control. Please take a look; if you have electric over hydraulic brakes (MS disk brakes) you may have the same issue as I have, even if you drive one of those vehicles without a factory integrated brake control!
I have a 2007 Ford F-350 with DRW, Tow Boss, Tow Command (Integrated brake control) options and a 2007 Mobile Suites 36 RS3. My Mobile Suites has electric over hydraulic disk brakes. I was assured by Double Tree, before finalizing my order in January 2007, that my Ford brake control would be compatible with the trailer.
Since taking delivery in April 2007 I continually get a trailer disconnect warning. Ford says the vehicle is fine, my MS dealer says the trailer is fine. I asked my Ford dealer to check further, they did. Ford HQ folks said "read your owners manual". The manual essentially states the Ford brake control will not work with electric over hydraulic brakes, only electric brakes. My dealer related that Ford can't make a brake control that works with both electric over hydraulic and electric brakes??
Never mind that you don't get to read the owners manual until you pay for the truck. No where does Ford mention any of this in their advertising or brochures.
I discovered that other brake controls likely have the same issue, electric brakes only !! Electric over hydraulic, yes the brakes will activate but you may get trailer disconnect warnings (if your control device has this warning feature) and is brake performance sufficient?
This is because the electrical resistance is different between electric brakes and the electric motor pump / actuator that activates to make the hydraulic brakes work.
My search has lead me to the new Tekonsha P3 http://www.tekonsha.com/p3.html . This brake control allows you to choose electric or electric over hydraulic during set up. My Ford dealer had to re-program the vehicle computer to ignore the factory control.
My experience thus far with my new Tekonsha P3, I am currently on my first trip with the P3, no disconnect messages. I swear the brakes seem to be more sure in their performance. For comparison, I put over 3,000 miles on the MS with the Ford brake control. Comparing the brake performance I have now I am convinced I have better brake performance.
Also check the pin box area of you MS. Mine has a warning statement sticker listing several items reference electric over hydraulic brakes. For this discussion, mine states the tow vehicle must have 13.5 volts or greater on the charge line to the brake actuator. The Tekonsha P3 has a feature that checks voltage, mine is showing 14.08 volts. I had no clue what was going on with Ford, an electric brake only controller.
I want to say my MS dealer; Walnut Ridge and Kent at Double Tree have been great. My Ford dealer has been great; they re-programmed the Ford computer and installed the Tekonsha P3 at no charge. Ford, on the other hand, needs to stick to making a truck and leave towing equipment to the trailer folks.
I apologize for this being so lengthy. I feel that this issue is worthy of discussion. I hope my experience encourages you to research more closely and ensure that your brake control is completely compatible with your electric over hydraulic brakes, if your MS is so equipped.
Paul and Margie McClellan
2011 Mobile Suites 36 RSSB3 #5647
2011 Ford F-350 6.7 Diesel, DRW, CC King Ranch, Pressure Pro, Firestone Ride Rite
2015 Mobile Suites 38 RESB3 on order