It don't surprise me as I know when Mopar started using TIPM modules (Totoally Indegrated Power Module) they started using high side drivers which as a dealer tech I had not seen that from the factory before on factory cars. They would just ground the relay coil all the time and then the high side drivers send 12 volts to the other side of the relay coil to turn on that circuit. They started doing this on a few circuits instead of controlling the ground which I thought was the easier way to control a circuit. Ron