Originally Posted by rgoers

Um... that doesn't look good! What happened?

Originally Posted by TNC

One of your brake light switches is stuck. Usually on a setup like ours it's the rear brake pedal switch that's connected to that spring. That rear brake switch is a plunger style switch. Unhook the spring by hand or with needle nose pliers and work the switch rod in and out with the key on to see if the light goes out. Sometimes due to the location of this switch, it gets crudded up with mud and such. If you find the switch causes the light to go on and off, then you just need to make sure the switch is adjusted properly to the brake pedal. You'll see a nut that you move up and down the switch body to change how aggressively the pedal pulls the switch on. Once you tinker with this switch by pulling it by hand, you'll get the gist of how this thing works.

Now, you might have a front brake switch issue too, or instead, but this switch usually works or it doesn't work. It's not adjustable. It has a simple pin that the lever pushes and releases. Look up under the brake lever housing and you'll get the idea. Now, I have seen an impact to a lever cause it to sit closer to the switch and hold the switch on all the time. When you see how simple it is, you'll see how it works.

Now, if none of these diagnosis work, you may have to break out a circuit tester, and that may require some simple electrical knowledge. Check out the rear brake switch first as I suggested, as this is the most common element causing a stuck brake light.