Toyota FJ Cruiser Big 7 Battery Cables Kit 2007-2014
Your FJ Cruiser deserves wiring that’s as tough as the rest of the rig. The Big 7 Battery Cable Kit replaces tired, corroded factory wiring with a rock-solid upgrade—delivering more consistent power, cleaner starts, and better overall performance on and off the trail.
What’s the “Big 7” Upgrade?
Most folks know the “Big 3” upgrade:
Alternator output to battery positive
Battery negative to frame/body
Engine ground to frame/body
Big 7 takes it further. Their kits add heavy-duty leads to the starter and fuse relay box, plus an external ANL fuse to protect the system from overload. More connections, more reliability, less chance of getting stranded.
Built to Outlast the Trail
100% Pure Copper Cable – No cheap copper-clad aluminum here. Big 7 only uses SAE-approved fine-strand copper for maximum conductivity.
Solid-Copper Terminals – Machine-crimped for strength, then sealed with marine-grade heat shrink for weatherproofing.
Military-Style Battery Clamps – Corrosion-resistant, rugged, and built for the long haul.
Easy Install – Every cable is clearly labeled so you spend less time guessing and more time wheeling.
Do You Need a Bigger Alternator?
Nope. Big 7’s cables outperform factory wiring even with your stock setup—faster starts, stronger charging, and often fixing electrical gremlins caused by age and corrosion.
Thinking About More Power?
Winch, lights, stereo, welder, or even a flux capacitor—bigger electrical loads demand bigger cables. Big 7 builds these kits to set your FJ Cruiser up for future upgrades without a hitch.
Proudly built in the Pacific Northwest, Big 7 Kits are designed by folks who know what it means to rely on your wiring miles from home. It’s the last battery cable upgrade your Toyota FJ Cruiser will ever need.
