Where is the Blower Motor Relay located

I cannot locate where the blower motor relay goes. I was able to purchase a blower motor relay, but I do not see and cannot find where it goes. I have a book it does not show where. However, it does mention the relay in heater core replacement instructions.

My blower will occasionally continue to run when the key is out. It's my understanding that this is a relay going bad. I got what was said to be a blower motor relay. There is not one, as you have said. The only relay that sounds close is the A/C clutch relay. I don't think that would be a source of the issue. If there is no relay, what is going on and why would they sell a relay that says its for the blower motor? 1997 Jeep Grand Cherokee 4.0.