The Big7Kits Big 7 Battery Cable Kit is a complete electrical system upgrade designed to replace old, worn-out factory battery cables on early 4Runner platforms. Years of corrosion, heat, and environmental exposure degrade factory wiring—this kit restores proper current flow for stronger starts, improved charging, and more reliable electrical performance.
This isn’t just another “Big 3” upgrade. It’s a true Big 7, engineered to exceed factory capability and future-proof your 4Runner’s electrical system.
Important Note
-
Big 7 upgrade: Improves current capacity for alternator output, battery grounds, starter, and fuse relay circuits.
-
Beyond Big 3: Includes starter and fuse relay leads plus an external fuse to prevent routing higher current through factory fuse wiring.
-
Pure copper: Uses SAE-approved fine-strand pure copper cable, not copper-clad aluminum (CCA).
-
Crimp quality: Solid copper lugs are crimped using an electromechanical crimping machine for maximum conductivity.
-
Environmental seal: Marine-grade heat shrink meets MIL-I-23053/4 standards for corrosion resistance.
-
Battery terminals: Includes military-style corrosion-resistant battery connections.
-
Fuse protection: Includes ANL fuse and fuse holder for safe high-current routing.
-
Ease of install: All cable ends are clearly labeled for straightforward installation.
-
Alternator: Does not require a larger alternator—works perfectly with stock systems.
-
Reliability: Helps eliminate electrical issues caused by aged and compromised factory wiring.
Why Upgrade to Big 7
-
Starting power: Reduces voltage drop for faster, stronger starts.
-
Charging efficiency: Improves battery charging consistency and performance.
-
Electrical reliability: Eliminates many common electrical gremlins in older vehicles.
-
Future-ready: Prepares your 4Runner for winches, lighting, inverters, audio systems, and other accessories.
Cable Size Options
-
2 GA: Ideal for stock vehicles or mild electrical upgrades.
-
1/0 GA: Recommended if you plan to add accessories later and want to future-proof your system.
-
2/0 GA: Maximum-capacity option for high-demand builds or those who want the biggest upgrade available.
Specifications
-
Cable material: SAE-approved fine-strand pure copper
-
Insulation: Marine-grade heat shrink (MIL-I-23053/4)
-
Terminals: Solid copper lugs with military-style battery connections
-
Fuse type: ANL fuse with holder
Package Contents
-
Cables: Big 7 upgraded battery cable set
-
Terminals: Military-style battery connections
-
Protection: ANL fuse and fuse holder
-
Labeling: Pre-labeled cable ends for easy installation
Vehicle / Fitment
-
Fits: Toyota 4Runner
-
Years: 1990–1995
-
Application: Factory battery cable replacement and electrical system upgrade
