✅ Checklist car jump start
... By Markus Fleschutz 📅 January 2, 2020
- The wire cross-section of the jumper cables must be at least 25 mm².
- A discharged battery can freeze already at -10°C. Before connecting the jumper cables, a frozen battery must be thawed.
- The discharged battery must be properly connected to the vehicle electrical system.
- All power consumers are switched off
- Avoid open flames in the vicinity of the battery during the jump-starting process, as flammable gases can escape from the battery.
CAUTION: If the connection instructions are not followed exactly, there is a risk of burns from battery acid. In addition, damage may occur due to a battery explosion as well as defects in the electrical systems of both vehicles.
CAUTION: The terminals of the jump-start cables must not come into contact with each other when the cables are connected, or the positive terminals must not touch any ground points (body or frame), otherwise a short circuit will occur!
- Let the engine of the vehicle supplying the current run at idle speed.
- Connect jump leads in the following order:
- connect the red cable to the positive terminal of the discharged battery
- connect the other end of the red cable to the positive terminal of the battery providing the current
- connect the black cable to the negative terminal of the battery that supplies the current.
- connect the other end of the black cable to a good ground (e.g. the engine block) of the receiver vehicle.
- Start the engine of the receiver vehicle and let it run. When starting, do not operate the starter motor continuously for more than 15 seconds, as the terminals and cables heat up due to the high current consumption. Therefore, take a "cool-down break" of at least 1 minute in between.
- After jump starting, disconnect cable IN UNCONTINUED CONSEQUENCE.