My 1999 DeVille Concours A/C and heater fans don't come on.
open hood,look in main fuse box for blown fuses,or bad relays to heater fans. the a/c fan should come on only when you turn a/c on at the dash panel only. it has nothing to do with the heat. if the heater blower fans don't come on, then look in the main box[fuse] for a blown fuse also. otherwise the problem is in the heater control module.[where you turn on a/c and the heat] that panel has a different fuse location.under the dash drivers side or on panel on drivers door at the door jam[where the door shuts towards the front of car,under mirror,but inside] look for fuse panel there also for blown fuse. hope this helps,but if not,recommend you seek a pro.such as cadillac
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