I Have A 2000 Cavalier. Today I Lost Only My Low & Med Speeds On My Fan, Just The High Speed Works. The Climate Control Fuse Is Ok On Side Of Dash. In The Engine Bay Fuses There Is A Silver Relay (i Think) For The Fan ? Is This A Resistor For The Fan Motor , And How Would You Check This To See If Its The Problem? Thank For Any Help You Can Give Me.