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Must-Know "Big 3" Upgrade: Enhance Power & Reliability for 2002 Ford F350 Dual Batteries

Must-Know "Big 3" Upgrade: Enhance Power & Reliability for 2002 Ford F350 Dual Batteries
Big 3 Wiring Upgrade 2002 Ford F350 with Dual Batteries Chart and Diagram

Upgrading the “Big 3” wiring in your 2002 Ford F350 with dual batteries can significantly improve the electrical system’s performance and reliability. The Big 3 refers to the three main electrical cables that carry current from the battery to the alternator, starter, and chassis ground.

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