My Town and Country minivan's fan/blower won't turn on at all; no matter what setting I turn it to. I know it was working yesterday when I drove two hours but it wouldn't come on at all today. The fuse is good and I was going to try the Relay which is near the fuse but the parts store didn't have one. I have three other relays that have the same numbers on them. Can I remove one and put it in the blower relay space to test it?