Hopefully, my two previous posts with the wiring diagram will finally show up, so I'll just keep writing...(apparently, my previous posts had a picture or weblink embedded, and they have to be approved...whatever...)

Disconnected the wires at the fan and ran them directly to the battery, brown to ground and black to positive, and viola, the fans came on, and those puppies move a serious amount of air! However, the jumper wire got SO hot so quickly I had to disconnect it asap. So that's telling me those fans are pulling a lot of juice. I used the multimeter to check the ground wire I had going to the fan, and it's good. The connection of the fused line off the relay to the battery had a good connection at the battery. However, when I tested the end of the wire coming off the relay to the fan power, it didn't register anything.

I tested the switch per the diagram, running the ground off the switch to the ground wire for the fan, and the switch worked (LED light came on in the "ON" position, went off in the "OFF" position). However, the switch, as wired in the diagram, would not turn the fans on. I checked the 20A inline fuse from the relay to the battery, and it was fine.

I went to Pep Boys and spent some time in their electrical section. Found a 40A relay, a relay connection, inline fuse holder for a blade fuse, some 14g wire, and some 14g wire connectors. One thing different about this 40A relay is it has a ground wire, where the 30A relay I'm using now doesn't. I'm planning on putting a 30A fuse into the new line, so maybe that will make a difference?

I'm going to try and wire up these new components tomorrow morning, and hopefully it'll work. The fans work when wired directly to the battery, and the switch works, so it has to be the relay, right?!