Factory R12 a/c on my 70 Chevelle just quit. I checked the fuse block in the car and the inline fuse on the firewall and both tested ok. But my blower motor doesn't turn on and my compressor doesn't engage now. It worked fine last night. I just started the car this morning and when I turned on the a/c, I could've sworn I heard a click, like a fuse or relay blowing, but I can't find anything so far. But I'm not really sure what else to check. Any help is appreciated.
Thanks!

You will likely need to remove the dash pad and the center vent to access the control head. A common problem with the 70 71 72 is the fan switch/connections get hot cooks the switch and melts the connector.