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So driving down the road I had to slow down kind of fast and my dash pops up and reads brake wiring fault.
So I ended up in a dirt lot to park but got the idea to test the trailers brakes by turning up the brake controller and holding it on and sure enough the left rear wheel doesn't skid and the others do.
Home now and ready to get under it as years ago I installed individual fuses on each brake panel so that if one shorts out I would still have some brakes.
Checked the fuses and none are blown and don't see any broken wires yet but that one is not working and haven't pulled it apart yet.
Just to note, this is a two axle four brake system.
QUESTION: Just how smart is the Ford brake controller?
Can it really tell when the draw is not the same and or know when there is a change in the resistance of the system?
Well Ford's brake controller is pretty smart!
This is what I found after I took off the brake hub.
That stupid little clip that holds a magnet on is gone And the wires never shorted to blow my fuse.
Last edited by Dakar Dad; Oct 19, 2020 at 08:58 PM.
Reason: Added the same picture twice.
Based on my experience the most common problem with brake controllers of all persuasions are open circuits rather than shorts.
Steve
They also all hardwired connections so it makes them that much harder to diagnose.
I am surprised though that it knew there was a difference in resistance in the system.
I read this the other day and didn't want to weigh in, but it's not so much that it sees a difference in resistance necessarily, but rather just a condition that isn't what it considers normal. Which, for most of us, is enough to say 'okay, better go check stuff out and see if it's safe to pull this trailer.'
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