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Trailer Help?? MYCO & F350 DRW

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Old 11-24-2020 | 12:30 PM
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Originally Posted by Smitty275
Is the fuse in place? Have you hooked to any other trailers that worked properly?
Dead nuts on, I didn't think about that.

Electric Over Hydraulic signal to the trailer requires TWO wires, not one.
In the pics above, the center Pin "7" is extending 12V+ constant power to the from the truck to the trailer. This POWERS the EoH pump. (Note, this is probably 13-14V+ when the truck is running; from alternator output.)
The lower Pin "2" is the Electric brake signal, which tells the Pump to TURN ON, (apply brakes), and at what pressure, via a variable 0-12V+ when the brakes are applied via the pedal, or when you use the manual brake switch on the dash/controller.

The Center Pin is normally powered by a "Trailer Power Fuse" in the fuse box, likely under the hood with at least a 30 Amp Fuse. That fuse is often not installed from the factory, or it could be blown. Check that first. Ensure + constant voltage on center pin coming from truck anytime ignition is turned on/truck is running.
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Old 11-24-2020 | 12:34 PM
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Thanks guys, going to have my Mechanic call and see if they can figure this out... I appreciate the insight.
Will Let you know what comes of it.
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Old 11-24-2020 | 03:33 PM
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For what its worth, my 2020 Ford F350 will not apply any 12 volt power to the trailer until I manually apply the electric brakes This happens only when initially hooking the trailer up with the truck already running. If I have the trailer plugged in and start the truck everything works as it should. My 2015 Chevy 3500 required the CAM, my 2018 Chevy 1500 with aftermarket Prodigy controller didn't care what was connected it worked and was the best controller of all three. I have the Hydrastar EOH and CAM setup and they work awesome, highly recommend them!
This winter I'm building a new triple axle trailer and it will have the Hydrastar system also.

Last edited by 111scoundrel; 11-24-2020 at 03:36 PM.
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Old 11-25-2020 | 12:08 PM
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Originally Posted by Smitty275
Is the fuse in place? Have you hooked to any other trailers that worked properly?
Originally Posted by Sydwayz
Dead nuts on, I didn't think about that.

Electric Over Hydraulic signal to the trailer requires TWO wires, not one.
In the pics above, the center Pin "7" is extending 12V+ constant power to the from the truck to the trailer. This POWERS the EoH pump. (Note, this is probably 13-14V+ when the truck is running; from alternator output.)
The lower Pin "2" is the Electric brake signal, which tells the Pump to TURN ON, (apply brakes), and at what pressure, via a variable 0-12V+ when the brakes are applied via the pedal, or when you use the manual brake switch on the dash/controller.

The Center Pin is normally powered by a "Trailer Power Fuse" in the fuse box, likely under the hood with at least a 30 Amp Fuse. That fuse is often not installed from the factory, or it could be blown. Check that first. Ensure + constant voltage on center pin coming from truck anytime ignition is turned on/truck is running.
Originally Posted by Spicy
Thanks guys, going to have my Mechanic call and see if they can figure this out... I appreciate the insight.
Will Let you know what comes of it.

Thanks Guys... it didn't have the "center pin" 30 amp fuse installed that Sydwayz spoke of... Jared through a fuse in it and it worked great.
Simple fix but wouldn't of known to look there without the help!!
As always Thank guys.
NT heading south in a few days for it's winter hideaway!!

Happy Thanksgiving

-Patrick



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Old 11-25-2020 | 02:57 PM
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Glad it was simple Pat. But Smitty275 figured it out first. I just added some color.
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Old 11-25-2020 | 05:48 PM
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Glad you got it working.
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