Blower motor is brand new, tried a replacement just in case and it still did not work. I've got a new diffuser on the wire harness. Lights come on for the ac when I turn the knob on the dash, but the blower wont start. I'm looking at the mag clutch relay. Not sure how to check if it's working. Other relays in the fuse box look different. Any suggestions? Am I looking in the wrong place?