1997 Chrysler Town and Country wipers, door locks on interm

My minivan has just started having problems.I think that they may be electrical, or a module that's going out.

When driving, the wipers will come on without being turned on manually. I 'turn them off' manually and they stay off. Sometimes all that day; sometimes they restart on their 'own'.

And the power door locks are sometimes difficult to operate (require re-inserting key or pressing the power unlock remote multiple times, also sometimes occurs when inside and wanting to open/unlock doors to exit.

The back/rear/tailgate door makes a very noisy kind of rumbling/grinding noise when the doors automatically lock (upon reaching a certain speed) and also when locking and unlocking the car.

Suggestions about which might be causing this?

jm