Hey guys, I replaced my ignition switch last spring due to non-start issues. My intermittent blower motor, cruise and rear defrost problems came after that. I don't see how the ignition switch could be tied to the blower motor. When my blower motor works, my cruise control works and my rear defroster works. The outside ambient temp. Must be above 60F and then the problem is intermittent, otherwise the 3 functions will not work ever. I don't know much about auto electronics, but these functions might be controlled by the BCM. I remember from reading posts on this site about my non-start issue that the BCM has some control of the signal in the starting. So, maybe the BCM is at fault?
2002 base Impala with 203,000 miles. Ignition has never been better since reading on this website about changing the Ignition switch.
If you can dig into this blower motor issue in more depth, I would appreciate it.
Monday, January 16th, 2012 AT 8:51 PM