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F-250 trailer plug

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Old 09-24-2017, 08:34 AM
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Default F-250 trailer plug

Referring to the round 7 pin.....Im installing a new EOH controller on the trailer ( Dexter 1600 ) Ive got everything to work except the blue controller wire from the integrated controller on the dash. If I meter the pin with the controller engaged Im reading 2.8 vdc, is this right ?? this doesn't seem to be enough voltage to fire the trailer pump. If I put 12 vdc direct to the blue wire on the pump it comes on and builds pressure, Anyone have thoughts on this.
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Old 09-24-2017, 09:51 AM
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Just found this on another forum, mines a 2005, total BS, I'll hook on to it and test it.
On the early model 2005 trucks the controller does not apply full
brake voltage under 15 or 25 MPH. Seems like the cutoff was
mar or apr of 05. If it was mfg before that date it will be like that.
After that date the brake circuit works at any speed.
I got this information from another site.
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Old 09-25-2017, 01:25 PM
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I've got the same Dexter pump pulled by my 2000 Excursion, but without an intergrated controller. I went with a high-end aftermarket controller, and it was still a lot of work to get it to work right. Nature of the beast maybe? Anyway, once finally figured out, it works well, and so will yours. Good luck.
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Old 09-25-2017, 01:42 PM
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Integrated controller,s on newer truck,s are wacky I could not get the factory one to work comfortably on my 15 ram 2500 I went for a prodigy 3 and now we got some action .
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Old 09-25-2017, 03:05 PM
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The problem with bypassing the integrated controller is getting the aftermarket one to work without throwing a warning light on the dash.
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Old 09-25-2017, 03:07 PM
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Im gonna get my neighbor to sit on the tongue of the trailer and pull him about 25mph while on a cell call and have him tell me if the pump is working.........LOL....what was the ford engineers thinking...........obviously they were'nt
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Old 09-25-2017, 03:15 PM
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The Constant Hot wire is what powers the pump.
The Blue Wire is what tells it to turn on, and how much.

You need to have the Constant Hot wired up as well.

I don't know for certain how the Integrated Controllers work. It might be:
-reading the actual brake pressure, and translating that to an electrical signal to send to the blue wire.
-just detecting that the brake light switch has been tripped, and applying voltage to the blue wire that you can vary with the adjustment
-using a pendulum or inertia based controller somewhere, that only varies the voltage to the blue wire when the truck is actually decelerating.
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Old 09-25-2017, 03:26 PM
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All connections are correct, and break away works when pulled, its just that you cant test it sitting still.
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Old 09-25-2017, 03:29 PM
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Quote:
Originally Posted by F-2 Speedy View Post
All connections are correct, and break away works when pulled, its just that you cant test it sitting still.
You should be able to with the slider/emergency switch on your brake controller.
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Old 09-25-2017, 03:38 PM
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Quote:
Originally Posted by Sydwayz View Post
You should be able to with the slider/emergency switch on your brake controller.
doesn't work that way either, the only way to energize the pump is to pull the break away switch or put +12 direct to the blue wire.........my truck was built 11/04 so it falls into this category, see my 2nd post I found on a truck site.

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