Check for battery voltage going to the primary side of the coil when you have the switch turned on. If you don't have any voltage, you won't have any spark either. You may have to disconnect the small wires to check for the voltage.
You can test the coil using an ohm meter. Disconnect the small wires and put your meter's function switch in R X 1 position. Touch the meter leads to each of the primary coil winding posts. You should read between 2-3 ohms.
As for the noise from the front end, I don't have any idea. You may want to pull the headlamp and look inside the there. I think the FXR is like a Sportster in the fact that most of the wiring is in the headlight assembly.
Good Luck
Steve
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