where is the relay for the blower motor and which one is it

Ok, The blower motor relay is located in the under-hood fuse block, and it does sound like it is turning on the motor inappropriately. The trick is finding out why. What else comes on when the key is out? Do you have a multimeter to test the ignition switch?

IF you still can't find it - try over on the passenger side firewall at the quad relay group (4 relays) .. Second relay from the left, best I can remember... Unplug relay to see if fan stops... (This is a full size relay)