Hello everyone.

I recently had to replace the heater core in my 2002 mustang GT myself, after doing the entire process I started the car and the heater worked just fine. The next day I started the car and the blower does not engage at all, But everyone else works fine its just not blowing any air at all. Does anyone know where all the wire connections are that are directly related to the Blow itself? All fuses and such have been checked,

 

Check the blower motor resistor. Its probably located right behind your glove box door.