You need to replace the blower, cut out a section from the hood side then replace it with a new one and place insulation layer glued to the casing
if it was replaced them most likely the terminals in the connecer ar sloppy and need to be tightened unplug the blower connecter and look at the terminals a small pick is udes to prise the trems up and tighten them
Check the ground wire behind the alternator.
A 1998 Cadillac Deville does not have a blower relay. The system has a fuse and a controller to feed power to the blower motor.
A bad resistor or a bad switch.
The blower motor relay on a 1980 Cadillac Coupe Deville is situated on the passenger side. It is located in the vicinity of the firewall and is just below the windshield.
bad blower motor
On the fire wall. Behind the engine.
Probably the blower motor, wiring to it or control switch
With that year deville...its more than likely the blower motor
blower relay 1992 Caddy sedan deville
AnswerDepends whats broken ie. blows cold, no blower at all ???????no blower at all
The blower control module is defective.
when i changed the bm everything worked fine.$60 for the part.
sounds like you have a bad blower motor.. i just replaced one on my 02 deville for the same reason with the same symptoms