Re: zanussi DA6152
You’re probably looking at the wrong part of the machine for the fault. Timer motors virtually never fail.
The resistance that you quoted is about right.
The timer only advances when it is allowed to by other components in the machine. eg thermostats, fill switches, timer contacts etc.
If the timer is sticking in two places on the dial then suspect a heating/thermostat problem. If it sticks in numerous places then suspect a fill problem.
Remember to always disconnect from the mains supply before any investigation. Remember also that dishwasher panels have notoriously sharp edges.
Bob