Fan Doesn't work on 1996 Toyota Tacoma

For the past year my fan has been acting weird. When i was in California it would work in the summer but not the winter, but now we are in kansas and it is doing the same thing, but it is colder here and i need it so wasn't sure if it was the blower itself or if it couls be the resistor?

Asked by for the 1996 Toyota Tacoma
Check the voltage and ground signals to the blower motor, this will help to narrow it down.