Ford Excursion :: 2005 - No Brake Lights When Pedal Depressed

I have a 2005 Excursion 4x4 Limited 6.0 diesel. I had someone pull alongside me today and tell me my brake lights were out. Sure enough. I double checked and nothing at both lower lights and also nothing at the third brake.

So... here's the short version of the things I've checked so far:

1. no brake lights when pedal depressed.

2. running lights work fine

3. turn signals work fine

4. hazards work fine

5. brake lights DO illuminate when I press the brake button on my trailer brake controller

6. checked power to the green with red tracer wire going to the brake light switch on the pedal. 12 v present continuously

7. checked power to light green wire. 12 v present when pedal is depressed. 0 v when pedal is released.

8. checked power to tail lights (wish I had tried the trailer brake controller sooner, this step would have been unnecessary). voltage present (I think 10-12 v) when the running lights were turned on. 0 v when brake pedal depressed. I suspect now that I would have 12 v when squeezing my trailer brake controller button.

I was pretty convinced it was the brake switch at the pedal. But since I'm seeing the voltage pass through the light green wire when depressed.... I know the wiring to the lights are good because they work when pressing the trailer brake controller button.

So... Do I need to dig into the multifunction switch that I've been reading about? Does the power go from the pedal switch to the multifunction, then to the trailer brake controller? I'm really hoping that I don't have to dig into the column to check that multifunction switch!