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3rd Gen Ram Tech2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
heres what your gonna do...underneath the passenger side of the dash you'll see the blower. there should be a connector going into the housing. take off the connector and remove the the screws holding the resistor into the housing. Now sniff it or look for any noticable things wrong. If it smells burnt or looks like somthin is wrong replace it thats ur issue.