Volvo XC90 Owner's Manual page 204

2007 Volvo XC90
switching off the ignition before disconnecting the battery so that all information in the vehicle's
electrical system can be stored in the control modules.
pg. 193 Maintenance
Battery
- Disconnect the negative (ground) cable first.
- Disconnect the positive cable and pull the ventilation hose (see next page) from the battery.
- Lift out the old battery and put a new battery into place.
- Connect the positive cable first.
- Connect the negative (ground) cable. - Be sure that the ventilation hose (see below) is securely
connected to the battery and that the other end of the hose is properly routed through the ventilation
opening in the floor of the battery compartment.
- Reinstall the cover and retaining bracket and screw it securely in place.
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