Resistor in the steering wheel too??
What value resistor did you use?
Airbag light is because you have a dodgy contact or resistor.
Check each resistor with a multimeter and ensure good contact is made by doubling over the ends so it's a very tight fit.
You also probably need to align your steering angle sensor, there is some sort of marker but mine doesn't work so I just remember it's 2 and a bit full rotations from one end.