im cam, a licenced diagnostic tech
you will need to see if it a power supply problem or a ground control problem
check for power at the dark blue wire at the blower motor. there should be 12volts there with ignition on.
if not, there is a blower motor relay in the underhood fuse relay box to check
if power is good, than you will need to remove the heater control head assembly and check the connection at the back of it.
you will inspect the larger wire connector forr burnt and melted connector and wires.
these control units are bad for melting.
there is a black and light green wire, this is the fround supply for the blower control. make sure this is a good ground
apply this ground to each of the wires that go to the resistor. i have included a diargram for you
if the blower works after applying this ground than the control head is faulty