If anyone is around that knows wiring well, sure could use some help understanding what is going on with my 68 with factory AC. I've seen a lot of old posts on wiring that have been helpful.

The relay on top of my AC box under the hood has a 3-wire connector. The black with orange strips comes from the alternator with a newer in-line blade type 30 amp fuse. The purple goes to the blower motor. The dark blue goes to the resistor. Then there is a separate brown wire that comes from the firewall connectors on the drivers side with what I think is an original "blower motor" label and original style plug that is not connected to anything.

I know that the black with orange stripe has been modified since it has the newer blade-type inline fuse, but I believe it still would have connected to the alternator. I can't tell if the purple one going to the blower motor is a modification from original or something OE that I can't find in the manual. The blower seems to work fine.

The car has a POA eliminator and Sanden compressor, but the wiring for these seems separate from what I have going on at the relay.

Other side questions - the plug with the dark blue, light blue and yellow going into the resistor is badly melted. Are the plugs available anywhere, and I assume this is a sign that the resistor has or had a problem?

And with the black with orange stripe wire coming from the alternator, is there a reason I can't have that come from a 12V buss rather than straight off the alternator, in an effort to clean up the wiring?

Thanks for any help, and definitely ask for clarification if you need more info.