Ford Focus Owners Manual: Battery connection points

Using booster cables

CAUTIONS: Connect batteries with only the same nominal voltage. Always use booster cables with insulated clamps and adequate size cable. Do not disconnect the battery from the vehicle’s ...

Wheels and tyres

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More about Ford Focus:

Ford Focus Spark Plug Inspection
Inspect the spark plug for a bridged gap. Check for deposit build-up closing the gap between the electrodes. Deposits are caused by oil or carbon fouling. Install a new spark plug. Check for oil fouling. Check for wet, black deposits on the insulator ...