Blower motor relay shorting out. I cannot turn my fan on any higher than low. If I do, the relay burns out. One of the prongs on the relay burns out. I have replaced the relay at least 5 times. Makes it dam hard to defrost the windshield . Then after awhile it will burn out even on low. Can't get a straight answer from anyone... Is it a short in the wiring? Do I need a new blower motor. Is this going to be a costly repair? Would like some idea before I take it to a garage