How to Jump Start a Volvo V90 Cross Country

1. Put the ignition in mode 0 and confirm the auxiliary battery is 12 volts.
2. If the helper battery is in another vehicle, switch that engine off and keep the vehicles from touching.
3. Clamp the red cable to the auxiliary battery's positive (+) terminal (1), then fold back the cover on your vehicle's positive (+) jump start terminal (2).
4. Clamp the other end of the red cable to your vehicle's positive (+) jump start terminal (2).
5. Clamp the black cable to the auxiliary battery's negative (-) terminal (3), and the other end to your vehicle's negative (-) ground point (4).
6. Check the clamps are secure, then run the assisting vehicle's engine at about 1500 rpm for a few minutes.
7. Start the engine of the vehicle with the dead battery.
8. Remove the cables in reverse order, black cables first and then red cables.

• Do not touch the cable connections to the vehicle during the start attempt because of sparking risk.
• Make sure no black cable clamp touches either positive jump start terminal or a red cable clamp when removing.

Source: 2019 Volvo V90 Cross Country owner's manual, PDF pages 458, 459. 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.