Recently my son pulled the rocker switch that controls the interior lights out of the interior light assembly. In doing so, he also lost all of the contact points that allow the interior lights to function so I was unable to repair it. I pulled the assembly out and purchased a replacement from a local Volvo dealer. My problem is that when I plug the new one into the harness, I get a continuous pinging as if I had left the door open with the key in the ignition and the Low Oil warning lamp comes on and does not go off. As soon as I disconnect the new assembly, the pinging stops and the lamp goes off. There is nothing going on otherwise that should cause the pinging and the oil level is OK. Any insight that anyone could shed would be greatly appreciated.