I had taken my 2012 1500 into the dealership (separate issue, my mechanic nor I was able to diagnose, either was the dealer) earlier this week, but on Tuesday morning had no airflow at all. Single temperature control, both the fan speed light and AC light were on. My aftermarket backup camera was no longer working either. Honestly, none of the work the dealership did should affect any of this, I'm in agreement with them on that.
Some troubleshooting later, blower motor works fine on 12V. Blower motor resistor was corroded to hell which I thought was my smoking gun. Once replaced, still no joy. The J15 (Front HVAC) fuse is popping as soon as I try to turn the fan speed on. The front HVAC relay is clicking as it should. I'm looking for a wiring diagram or any assistance in troubleshooting this, hoping it does not turn into an electrical gremlin and I don't melt before I figure this out. Thanks all.
Some troubleshooting later, blower motor works fine on 12V. Blower motor resistor was corroded to hell which I thought was my smoking gun. Once replaced, still no joy. The J15 (Front HVAC) fuse is popping as soon as I try to turn the fan speed on. The front HVAC relay is clicking as it should. I'm looking for a wiring diagram or any assistance in troubleshooting this, hoping it does not turn into an electrical gremlin and I don't melt before I figure this out. Thanks all.