Ford Power Stroke 6.7 Diesel - F250/F350 Battery Cable Kit (2017-2021)

F‑250 / F‑350 (2017–2021)
Faster Starts. Stronger Power. Built Better Than Factory.

This Big 7 Battery Cable Upgrade Kit for the Ford Power Stroke 6.7L Diesel (2017–2021 F‑250/F‑350) replaces aging, worn‑out factory battery cables with high‑quality OFC (oxygen‑free copper) cables engineered to deliver more power, better electrical performance, and faster, more reliable starts.

Factory battery cables were never designed to last the life of a diesel truck. Heat, vibration, moisture, and corrosion increase resistance over time—robbing power from the starter and charging system. The Big 7 restores clean, efficient current delivery throughout the entire electrical system.

Built to outperform factory cables and engineered to last.

Why Upgrade Your Battery Cables?

If your Power Stroke cranks slower in cold weather, struggles to start consistently, or has unexplained electrical issues, the problem is often hidden inside the factory wiring.

Common issues with factory battery cables include:

• Internal corrosion restricting current flow
• Increased voltage drop under load
• Resistance caused by age or poor prior repairs

Upgrading your battery cables allows full current to reach the starter and electrical system, improving reliability and overall performance.

Big 3 vs Big 7 — What’s the Difference?

A traditional Big 3 upgrade improves three cables:

• Alternator output to battery positive
• Battery negative to chassis
• Engine ground to chassis

The JeepCables Big 7 goes further by also upgrading:

• Battery positive to starter
• Battery positive to solenoid
• Battery positive crossover cable
• Starter to starter relay
• External MEGA fuse and holder

This design prevents increased current from being routed through undersized factory fuse box wiring, improving safety and long‑term reliability under high electrical loads.

What Makes JeepCables Different?

This kit is built with an uncompromising focus on materials, specifications, and durability.

• 100% fine‑strand, SAE‑approved OFC (oxygen‑free copper) cables
  No copper‑clad aluminum and no mixed metals
• Solid copper lugs, machine‑crimped
  Electromechanical crimping creates gas‑tight, vibration‑resistant connections
• Marine‑grade environmental sealing
  Adhesive heat shrink meeting MIL‑I‑23053/4 protects against corrosion and moisture
• Military‑style battery terminals
  Corrosion‑resistant terminals included
• MEGA fuse and holder included
  External circuit protection built into every kit
• Clearly labeled cable ends
  Simplified installation for DIY owners and professional shops

Do I Need a Bigger Alternator?

No. Even stock Power Stroke trucks benefit from improved power delivery. Reducing resistance allows your existing alternator and batteries to charge more efficiently.

Customers commonly report:

• Faster, more consistent starts
• Improved charging performance
• More stable voltage
• Electrical issues resolved after installation

Planning Accessories or Future Upgrades?

If you are running—or planning to run—a winch, auxiliary lighting, air compressor, inverter, upgraded audio system, or a higher‑output alternator, this kit provides the current capacity and wiring integrity needed for increased electrical demand.

Big 7 Battery Cable Kit Includes

• Battery negative to fender grounds (4 GA)
• Battery negative to engine block grounds (2/0 GA)
• Battery negative to frame grounds (4 GA)
• Battery positive to solenoid (2 GA)
• Battery positive to starter (2/0 GA)
• Battery positive crossover cable (2/0 GA)
• Starter to starter relay cable (10 GA)
• Two sets of military‑style battery terminals

Not Just a Diesel “Big 3”

This is not a generic diesel cable kit.
This is the Ford Power Stroke 6.7 Big 7 Battery Cable Kit (2017–2021) from JeepCables, engineered to upgrade every critical high‑current path in your truck.

Better than factory. Built to last. Designed for Power Stroke trucks that work hard and stay on the road.