I fixed the start button issue and realize I now have a problem with the steering wheel. The steering wheel works and will control the car in the game but there is no force feedback. Any diagnostic advice would be appreciated.
Do you still feel a vibration, or no response at all?
Loose or worn belt. Watch the steering assembly as you turn "against" the force feedback. Does the motor shaft turn, but the steering shaft doesn't? If so, pull the belt off. Check both sprockets for damaged teeth, just to be sure, but chances are you just need a new belt.
Motor driving circuitry failure. Disconnect the motor, and jab your multimeter in there. Provoke the force feedback and watch for voltages on the connector. No voltage? Check inside the boardset for fuses. If all fuses are good, you're in for some component level troubleshooting. If you replace the fuses and they just blow again, you probably have an incorrect or shorted motor.