Either the dolly or the car front wheels has to turn a bit when the coach makes a turn, but not both of them. If the dolly has a swiveling wheel platform, the steering on the vehicle should be locked or tied down if it has no steering wheel lock. The dolly owner manual or online instructions will be clear about that. If the dolly has a fixed wheel platform, then the steering on the vehicle should be unlocked/loose.
Most of the major brands of dollies these days have swivel platforms, e.g. Master Tow, Stehl, Kar Kaddy, and Roadmaster. Acme EZETow does not.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC