Recommended A-Frame Electric Jack w/a 7-Way Connector for a Trailer w/out a Battery
Updated 02/01/2026 | Published 01/28/2026
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Question:
Hello, I am thinking about getting an electric jack for my 20-foot horse trailer. It does not have an on-board battery. I am wondering if you can wire a 7 plug onto the jack wiring and plug it into the tow vehicle. My trailer has a 4000lb tongue weight
asked by: Matthew B
Expert Reply:
Hey Matt. You can indeed power a electric tongue jack off of your tow vehicle's 7-way connector since you don't have a battery. I recommend the etrailer Electric Trailer Jack w/ 7-Way item # e74GV. This jack has a 5,000 lbs capacity and provides up to a 22-1/2" lift with the included drop leg.
The etrailer Electric Trailer Jack w/ 7-Way item # e74GV fits a standard a-frame bolt pattern. It has a weather proof housing that also includes a LED light to help with connecting/disconnecting your trailer in the dark. The included 7-way cable is 48' long and can be securely attached to the built in bracket so you don't have to worry about dragging it on the ground.
What kind of horse trailer do you have?
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Mikec
2/1/2026
I use my jack on a 26 ft equipment trailer. Love it ! No more cranking forever I have considered putting an on board battery on the trailer. But the cord the jack came with works just fine connecting to my truck.
Dennis J.
2/1/2026
I installed this electric jack on a 20 foot travel trailer. Because my 7-way on my pickup did not have 12-volt power except for lights and brakes I had to run power to the plug. This required 10 gauge wire, piggy back fuse and a relay. Remember not to collapse the jack too far. It may bind up. There’s a warning sticker to prevent this.
Greg
2/1/2026
Bought the jack for my 32' toy hauler. Previous jack was rated 3000 pounds. When it needed to be replaced I got the 5000 pound unit to maybe be a little faster (not sure it is). The jack comes with a 7-way plug already wired in (with a storage holder for the plug). I removed the plug and wired the jack into my existing trailer plug. I did not know that was why they called it a 7-way jack when I bought it - might have been cheaper to get one without the plug. I can see that the plug attached to the jack wiring might be handy in some cases, but if you already use a 7-way plug on your trailer you have to unplug it so you can plug in the jack plug. And if you use the trailer with a vehicle without a 7-way plug (like to move it around the lot) you have no way to use the jack.
Product Page this Question was Asked From
etrailer Electric Trailer Jack w/ 7-Way - Drop Leg - A-Frame - 18" Lift - 5,000 lbs
- Trailer Jack
- Car Hauler
- Enclosed Trailer
- Utility Trailer
- A-Frame Jacks
- 4001 - 5000 lbs
- Electric Jack
- 18 Inch Lift
- Bolt-On
- With Round Foot
- etrailer
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Tim
2/1/2026
I have this product and I live it I don't have to break my back jacking my trailer up anymore and it plugs right into my 7 way trailer plug on my truck hope this helps you.