The common jumper-cable sequence is positive connections first, then donor negative, then the designated ground on the disabled car. Check both manuals before using that sequence.
Four connections, clearly labelled
For a compatible negative-ground 12 V system: 1. Red clamp to disabled-car positive (+). 2. Other red clamp to donor positive (+). 3. Black clamp to donor negative (−). 4. Other black clamp to the specified ground on the disabled vehicle, away from the battery. Remote jump points may be elsewhere than the battery itself.
Why the final connection matters
The final clamp can create a spark, so the specified remote ground keeps that connection away from battery gases. Identify terminals by markings, not cable colour alone. Never let connected clamps touch each other or unintended metal. Reversed polarity can damage electronics.
Before turning a key
Route leads clear of moving parts and follow the vehicle instructions for starting and disconnecting. If terminal markings or donor compatibility are uncertain, get roadside assistance. Never use this procedure on high-voltage components or a damaged battery.
