Ford Focus Owners Manual: Wheels and tyres

Battery connection points

CAUTION: Do not connect to the negative (–) terminal of the flat battery. ...

General information

CAUTIONS: Use only approved wheel and tyre sizes. Using other sizes could damage the vehicle and will make the National Type Approval invalid. If you change the diameter of the tyres from th ...

More about Ford Focus:

Ford Focus Battery, Mounting and Cables Inspection And Verification
Verify the customer concern. Visually inspect for obvious signs of mechanical or electrical damage.   Visual Inspection Chart Mechanical Electrical Battery Battery mounting Batt ...