I have a 2009 Volvo XC70 that is showing me the Tailgate Open Warning in the warning section of the cluster. At the same time the tail gate close button stopped working, the tailgate wiper stopped working and the tailgate defroster stopped working. Seems like quite a coincidence that all thes things stopped working at the same time when the day before everything was working fine. I have tested the relays in the cargo compartment and there is continuity in all 3 relays. When I turn on the rear wiper switch I hear the relay clicking as well as the rear defroster too. All fuses are good and wiring still looks new. Has anyone experienced this issue and found a solution?