Dual Batteries: Connect
WARNING: This page is about a different car, the 2003 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
- Connect primary battery to starter relay cable.
- Connect primary battery ground cable.
- Unwrap secondary positive battery cable and connect to primary battery terminal. Secondary positive cable is energized. To prevent vehicle or component damage, make sure secondary positive cable or tools do not contact any ground surfaces. Tighten battery cables to specification. See TORQUE SPECIFICATIONS .