I now have a functional brake controller. The first thing I did today was test the Tekonska unit to make sure t was working. I plugged the generic pigtail into the Tekonsha unit and touched the black and white wires to my camper's + and - battery terminals.
Next was testing the Tekonsha 3034-P cable. I had continuity on all four circuits.
The last test was the grey Ford plug, found behind my coin holder. The red wire had constant power, and the blue wire had power when the brake pedal was depressed. The problem was the two middle wires. They were reversed, and the ground wire (black with purple stripe) was not only reversed, but in the wrong row.
I cut the two middle wires from the Tekonsha plug and jumpered them around to the correct wire on the grey Ford plug.
I used these type of connector to jumper the wires.
https://www.mcmaster.com/products/el...g-wire-taps-8/