How to Jump Start a Ford Focus

1. Connect one end of the positive (+) jumper cable to the positive (+) terminal of the discharged battery.
2. Connect the other end of the positive (+) cable to the positive (+) terminal of the assisting battery.
3. Connect the negative (-) cable to the negative (-) terminal of the assisting battery.
4. Make the last connection of the negative (-) cable to an exposed metal part of the stalled engine, or to the ground connection point if available.
5. Start the booster vehicle's engine and keep engine speed between 2000 and 3000 rpm.
6. Start the disabled vehicle, then run both engines for three more minutes before removing the cables in reverse order.

• Do not connect the end of the second cable to the negative (-) terminal of the battery to be jumped; a spark may cause an explosion of battery gases.
• After removing the cables, let the vehicle idle for several minutes so the battery can recharge.

Source: 2018 Ford Focus owner's manual, PDF pages 194, 195. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.