My 2000 Dodge Ram Wagon 2500 has the RAS AM/FM Cassette. All speakers work on left side of van and nothing at all out of the right side. I no nothing about Infinity but will look if someone thinks that is present and tell me where it is located. When I had the bezel off I slid the unit out to look at the wiring connector and all looked connected but I don't have a clue.