V70 XC AWD L5-2.4L Turbo VIN 56 B5254T (1998)
If the pump not work check that the wiring between the relay and the pump are intact and that 12 V and ground are at the connector.
If there is no current in the connector and the Volvo Scan Tool (ST) does not give a diagnostic trouble code (DTC) the relay is defective and should
If the pump does not work and there is both current and ground the pump is defective and should be replaced.
battery and battery shelf
air hose to engine
Disconnect the airpump intake pipe from the pump.
Raise the car.
Remove front splashguard if this has not already been done