1993 Mercury Topaz Blower motor relay?

I have a 1993 Mercury Topaz, 140,000km on it.
Right now the the motor for my fan does not have any power to it. I have checked the fuses, nothing wrong. I have tested the fan motor with an external power source, fan starts up blowing air throught the vents. I am looking for a relay that is under ther hood of my car(apparently), but I cannot find it? Any help on where to look for this relay and what it looks like would be of help. Thanx!