Jumper Cable Question
Jumper Cable Question
Cargo Master
Joined: Oct 2011
Posts: 2,885
Likes: 778
From: SoCal/Wyoming
In a word…no. That connection is designed for powering a few lights, not providing enough power to jump a vehicle. Additionally, you run the risk of damaging the system if you rig up a connection and try to jump a car. As they say, always use the right tool for the job and a 7 pin is not it.
Lead Driver
Joined: Oct 2014
Posts: 5,945
Likes: 1,359
From: NY/Canada border
I'm no electrician. But if I recall correctly those who have run dedicated jumper cable plugs to the back, similar to what a wrecker may have, used heavy gauge wire and possibly relays to get what they needed.
As Dan said, that 7 pin ain't cutting it for such a draw.
As Dan said, that 7 pin ain't cutting it for such a draw.
4th Gear
Joined: Apr 2025
Posts: 4
Likes: 3
I would recommend getting a lithium battery jumper set like this.
The lithium work batteries handle high amp draws surprisingly well, you probably already have the battery and worse case, you destroy a battery and not your truck.
Noco also makes some great jumper batteries but they are a lot more expensive. The upside is they are great for providing power for other 12V/5V needs.
The lithium work batteries handle high amp draws surprisingly well, you probably already have the battery and worse case, you destroy a battery and not your truck.
Noco also makes some great jumper batteries but they are a lot more expensive. The upside is they are great for providing power for other 12V/5V needs.
Fleet Mechanic
Joined: Jul 2019
Posts: 1,651
Likes: 696
I think there is another problem besides the circuit not being able to carry the current required to start the truck (circuit protection fuse would blow); isn't the 12V wire in the 7 pin plug inactive until the truck is running and the brake pedal has been pressed, or something like that?
Logistics Pro
Joined: Jan 2010
Posts: 4,123
Likes: 1,645
I'll freely admit that I have never been in a situation where I wished I'd had a connection for this at the back of my truck. I have also never used anything lighter than 2 gauge jumper cables, and prefer 0 gauge. They're almost always longer and can handle high amp loads without question.
Mountain Pass
Joined: Sep 2007
Posts: 237
Likes: 4
From: Oconmowoc Wi.
Little of topic but the same, does anyone know how many amps the pin puts out for a trickle charger?
Trending Topics
Mountain Pass
Joined: Nov 2024
Posts: 186
Likes: 99
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Logistics Pro
Joined: Jan 2010
Posts: 4,123
Likes: 1,645
It is RATED to 25 amps...but if you're drawing that much, either you've got a fully dead battery or a short in the system somewhere. I wouldn't actively TRY to pull 25 amps over that wire. Keep it to 10 amps or less - that's where most battery chargers (not maintainers/tenders) put out.
Mountain Pass
Joined: Nov 2024
Posts: 186
Likes: 99
It is RATED to 25 amps...but if you're drawing that much, either you've got a fully dead battery or a short in the system somewhere. I wouldn't actively TRY to pull 25 amps over that wire. Keep it to 10 amps or less - that's where most battery chargers (not maintainers/tenders) put out.
Thread
Thread Starter
Forum
Replies
Last Post
blueeyedfordguy
Electrical Systems/Wiring
16
Apr 19, 2010 10:42 AM
pete98cobra
1999 - 2003 7.3L Power Stroke Diesel
2
Nov 10, 2008 10:50 PM