'75 Duster w A/C keeps blowing #5 fuse.

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My slant-6 '75 Duster has factory A/C. The A/C will blow cold for about 10 minutes then the #5 fuse blows and the power to the compressor clutch is cut. Everything else in the car works except the A/C clutch. I can run a jumper to the A/C clutch and it works fine. I have poured over the diagrams for a '75 Dart here:

http://www.mymopar.com/downloads/1975/75DartA.jpg
http://www.mymopar.com/downloads/1975/75DartB.jpg

but nothing lists the A/C circuit. From what I can trace if the #5 fuse blows I should lose a few lights, but I don't. The fuse is a 20-amp so I know there is some serious power going somewhere, but surely it shouldn't be going to just the A/C compressor clutch. I'm tempted to run a relay setup to isolate the power to the A/C clutch and see what happens (using a 20-amp fuse in the relay power circuit).

I have searched all over and can't find anything that diagrams out the A/C circuit. I am hoping someone here knows it a little better than I do.
 
i looked at the diagrams and nothing jumps out at me either. The A/C on my 72 is standalone too but probably because it looks like mine is dealer air. Hopefully someone will chime in and give you a hand...
 
This may help. I've got a similar issue with my 73, I can't run the blower on high because it blows the fuse. I'm pretty sure my issue is with the dash wiring...some of the connectors are nasty and when I replaced the flashers, one was RUSTED... :(

scan6-270009.jpg
 
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