Well... I tore the dash apart this morning, and found the problem.

The ISO matting connector that is shipped with the EMPEG does not mate with the white connector on the sled's connector.

I've attached a diagram of the differences in the connector and the sled connector. It's quite easy to see why it didn't work. My question, which one is right? I.E. get a fixed sled, or get a fixed pigtail?

I'm hoping the pigtail is wrong, as I can get that locally. I've also tried to pull the pin on the pigtail to move it's connection, but for some strange reason, it seems to get firmly attached.