How do i check the rr turn lamp on the ford fusion?

On a Ford Fusion, you'll find that your turn signals peter out from time to time. It's quite simple to check them; turn the indicator to the desired direction (in your case, the right), and see if the bulb is flashing. If it is, everything's good. If it's not, then it's likely you have a burnt out bulb, blown fuse, or other issue with the turn signal wiring (including but not limited to a short circuit). If the front bulb is flashing faster than normal but the rear is not working, this likely means that you have a burnt out bulb. You can confirm by testing resistance with a digital multimeter, or you can swap it out if you have a replacement lying around (it's recommended that you should). Otherwise, you'll need to delve into more complicated diagnostics.