Why will a reaction that forms a very weak electrolyte not form an equilibrium reaction?

Your preface is questionable. Do you have an example of one? All the weak electrolytes I can think of form in solution an equilibrium reaction.

No the question did not give an example with it. I was thinking the answer could be that it is harder for a weak electrolyte to dissociate in a solution than it is for a stronger electrolyte to dissociate. If a weak electrolyte can't dissociate completely an equilibrium reaction couldn't form. Is my answer correct or at least on the right track?