Okay well my car seems to have some electrical glitches to it. First off I have put 2 gauge clusters in this car because of the bulbs going out then the odometer not working, Second being the the first 2 blower selections do not work let alone the HVAC panel not lighting up. Third trunk and dome lights randomly flicker off and on while driving down the road. Fourth the car has a speratic idle when coasting to a stop. This car concerns me as I dont want anything else to go wrong with it and electrical issues are a nightmare to trace and daignose. Let me know if anyone else on here has any insight as to what it might be.

2009 Ford Mustang V6
heater settings not working is covered in the sticky's, its your blower motor resistor, the odometer light dying is a common thing, i just resoldered a new one in mine, instead of replacing the cluster. hvac not lighting up is probably just blown bulbs, take it out and have a look, dome light, could be a bad door pin switch
thanks gonna replace the hvac panel and cluster and prolly both switches as well and yup gotta buy that resistor. Will the resistor keep blowing still or have they got a revised model that wont blow now?

2009 Ford Mustang V6
unsure if its been revised or not, but i replaced mine 3 years ago and haven't had a problem with it yet