We recently moved into a new house with a 3 prong dryer outlet. Our
dryer is a newer model, which has a four prong cord. I bought a 3
prong cord to replace the 4 prong one and found some instructions on
how to do so. However, the one step that I am not sure about involves
the ground and the neutral. I have no problem attaching the left,
right, and center wires to the correct screws. However, our dryer
does not have a ground strap. It does have a green ground wire
running from somewhere inside the case of the dryer out to the ground
screw on the case. Is the dryer properly grounded with this wire in
place as is? From what I have read, the ground strap would have run
from the center white neutral terminal to the case. Do I need to add
something that runs from the center terminal to the case? And in that
case, what do I do with the green ground wire?

Thanks for your help.

Robert