1966 c10 brake lights stay hot

[Techx]

I am working on a '66 c10 and the brake lights stay hot even without the brake switch connected. It looks like a factor wiring harness to the fuse box, steering column, and the firewall connector for the rear wire run.
Anyone have any suggestions?

[Techx]

The steering column is all jacked up with no turn signal arm could that have something to do with it?

[Techx]

I disconnected the brake switch and these are my results below.
Main harness with Y to the steering column wire colors: row 1: purple, white, yellow, gray; row 2: black, dark blue, light blue, green

A. The steering column is not connected.
I. The wiring harness from the main to the steering column
1. Key Off with Lights off: read only black 12v.
2. Key off with Lights on: black 12v, gray and white are 6v, purple is 3v.
3. key on with lights on: gray and white are 8v, purple and black are 12v
4. Key on with lights off: black and purple are 12v, gray is 1v

II. The white wire and orange wire to the brake switch
1. Key Off with Lights off: white 0v, orange 0v
2. Key off with Lights on: white 0v, orange 6v
3. Key on with Lights on: white 0v, orange 8v
4. Key on with Lights off: white 0v, orange 0v

III. The rear harness connector at the firewall
1. Key Off with Lights off: Dark Green, brown, yellow all 0v
2. Key off with Lights on: brown 1v, dark green and yellow 0v
3. Key on with Lights on: brown 8v, dark green and yellow 0v
4. Key on with Lights off: brown 6v, dark green and yellow 0v

B. The steering column is connected.
I. The wiring harness from the main to the steering column
1. Key Off with Lights off: read only black 12v.
2. Key off with Lights on: black 12v, gray 4v,
3. key on with lights on: gray 6v, yellow 5v, purple and black are 12v
4. Key on with lights off: black and purple are 12v, yellow is 5v

II. The white wire and orange wire to the brake switch
1. Key Off with Lights off: white 0v, orange 0v
2. Key off with Lights on: white 0v, orange 4v
3. Key on with Lights on: white 0v, orange 5v
4. Key on with Lights off: white 0v, orange 0v

III. The rear harness connector at the firewall
1. Key Off with Lights off: Dark Green, brown, yellow all 0v
2. Key off with Lights on: brown 4v, dark green and yellow 0v
3. Key on with Lights on: brown and yellow 5v, dark green 0v
4. Key on with Lights off: yellow 5v, brown and dark green 0v

[Techx]

I fixed part of the issue when I hooked up an aftermarket blinker assembly. Now I'm not getting power to the brake button except when the headlights are on. I've moved to a new thread due to a different issue.
new thread: http://67-72chevytrucks.com/vboard/s...68#post8819468