Vehicle make/model 2005 Chevy monte carlo
Mileage = 57000
Engine size = 3.8
dash lights = nope
codes = nope
work done prior = none
work done to repair = none
tech = jk,mw,kk,sf
question = after stopping and shutting off the engine ,removing the
key, the blower fan motor still runs. start and stop the engine, remove
the key, still runs, took the blower fuse out of the fuse panel by the
passenger side door, still runs. took out the main 30 amp fuse under
the hood that says blower motor, it stops the fan
JK:
By what you are describing, this sounds like the blower control module/resistor is shorted, or the
a/c control head is malfunctioning. The blower control module is the most likely cause since
pulling the 30 amp fuse takes all power from the module. The way to be sure is to disconnect the
blower module and test for speed signal coming from a/c control head. There should be no
signal with key off . Unplugging the a/c control head during this malfunction will also tell you if the
a/c control head is at fault. The blower control module recieves signals from a/c control head
and power from that 30amp fuse, so disconnecting it takes both out of the system. The blower
control module is under the pass. side dash, in front of the blower motor. If would like to make a
donation/tip and come back I will help with step by step diag. of this system.
Back
Mileage = 57000
Engine size = 3.8
dash lights = nope
codes = nope
work done prior = none
work done to repair = none
tech = jk,mw,kk,sf
question = after stopping and shutting off the engine ,removing the
key, the blower fan motor still runs. start and stop the engine, remove
the key, still runs, took the blower fuse out of the fuse panel by the
passenger side door, still runs. took out the main 30 amp fuse under
the hood that says blower motor, it stops the fan
JK:
By what you are describing, this sounds like the blower control module/resistor is shorted, or the
a/c control head is malfunctioning. The blower control module is the most likely cause since
pulling the 30 amp fuse takes all power from the module. The way to be sure is to disconnect the
blower module and test for speed signal coming from a/c control head. There should be no
signal with key off . Unplugging the a/c control head during this malfunction will also tell you if the
a/c control head is at fault. The blower control module recieves signals from a/c control head
and power from that 30amp fuse, so disconnecting it takes both out of the system. The blower
control module is under the pass. side dash, in front of the blower motor. If would like to make a
donation/tip and come back I will help with step by step diag. of this system.
Back
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