Can I use my 7 pin trailer plug to run a fuel transfer pump?
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Laughing Gas
Joined: Apr 2011
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Can I use my 7 pin trailer plug to run a fuel transfer pump?
I had a 300 gallon portable tank made to fit in the back of my bed. I only need it there some of the time. Can I use the trailer wiring plug for power and ground for my fill-rite pump? Its 20 GPM, says to use a 30 amp circuit. Would be a lot more covenant than having to use an extra battery if I could just power it with the trailer wiring circuit.... 2015 king ranch 6.7
Hotshot
Joined: Oct 2015
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From: Wyoming
I'm not familiar with the older model, so I didn't address that. If it does have to "sense" the trailer then something will have to be added to the 7 pin to fool the truck into thinking a trailer is really there.
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Laughing Gas
Joined: Apr 2011
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I would have to run a bunch of wires plus the upfitter wiring is a major pain to reach in my 2015
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More Turbo
Joined: Jan 2005
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From: Henniker
On my 19 the trailer plug has 12v to the power wire with the truck off, but the 12v goes away when the truck is turned on. Still trying to figure that one out.
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From: Ozark, MO
Just a quick note. If the pump Mfg says to use a 30 amp circuit it does not mean it pulls 30amps as a constant. Typically the device, in this case your pump will run at 75-80% of the fuse rating. Check the specs on your pump for typical draw.
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From: BA, OK
Hotshot
Joined: Oct 2015
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From: Wyoming
True, but the surge amps could be higher than 30 amps. I have a water pump that has a published steady state draw of ~8 amps but a surge of 17 amps. I haven't tested it to see what it really draws. I suspect the surge is quick and not too much since it's usually pumping just air at first.
Hotshot
Joined: Oct 2006
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From: Texas
PS: For using the upfitter swirches I ran my own wires thru the firewall because my old hands and eyes could not work to connect to the pass thru wires that Ford provided. Made things a lot easier to hook up to the switches.
Last edited by Desert Don; Apr 16, 2021 at 06:09 AM.
Cargo Master
Joined: Feb 2015
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From: Livermore Ca.
What is the point of having upfitter switches if you are not going to use them? You may have to run more wire but then you can operate the pump from inside the cab and the pump can stay hooked up all the time.
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Laughing Gas
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