Any thoughts as to what goes to this relay? Also, where would I get the female connections for said relay? I can't find them anywhere.
That
is the blower relay. It is shown in the yellow box in the dwg below. It mounts on the outboard side of the evaporator housing and has 5 leads connected to it. Black and little orange go to the double tab connector. Dark blue, purple and big orange to the triple tab connector. When the time comes to wire it up, we can figure out which leads go where by looking at the diagram on the relay shell.
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What you describe below is not the blower relay. I can't imagine what it is - there are no electrical components associated with the HVAC system on that side of the engine. You aren't talking about the firewall junction block, are you?
P.S.- All my AC wiring is good on the passenger side of my truck until it runs to the driver side of the truck where the blower relay mounts on the firewall.
Here are some dwg's - and pages from the 1973 Service Manual. They have lots of good info in them:
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Look through them and I'll be back to help you tomorrow. I've been on this for a while and need to crash.
On this:
Also, where would I get the female connections for said relay? I can't find them anywhere.
If you can't source the OEM harness connectors, it's no big deal. Just go to an electrical supply house and get a box of the correct size solderless/crimp-on connectors. They will be fine.