The air in the car wouldn't come all the time now want come on at all. on 2008 Kia Spectra

You must bump cord under dash on passenger side in order for it to come on or you hit a bump in the street. When it is on cools great same with the heat. Was doing this for a couple of months now today it want come on at all. It was like whatever that cord was it was loose.

Asked by for the 2008 Kia Spectra
poss wiring to blower motor resistor is bad start there
Thanks! Is this something that is very expensive or would you know. I'm a single mom on a budget.