The Third Brake Light is located down the top of the rear Fin. It only comes on during braking. I was told by a rider behind me that my Third Brake Light was not coming on. My Slingshot was only about 3 months old and is under warranty, so why worry. Well time is my worry. If I drive 50 miles to the dealer and they find the problem is something has to be ordered, I am in a pickle for a return trip. This video was created to help isolate this problem to help save time and get you back on the road with the Third Brake Light working while the real trouble part is ordered. I have heard other reports of this problem, and it can go unnoticed, who goes back and look at their own tail lights with the brakes applied. Well you should do it, get someone to apply the brakes and check your tail lights fully for all working. Your safety is at stake and you may not have someone to tell you they are out. Some folks go the extra step to install an after market Third Brake Light Modulator to flash during braking. This will help with that process also.
Now once the you follow this test and find your Third Light does not illuminate, you will know how to isolate the problem and notify the dealer of what part you suspect to be bad. In my case it was the FM Radio Antenna Module that was bad and I was able to drive safely until the part was available. I told the dealer what I did to isolate the problem and they were good with it and ordered the FM Antenna Module ahead of time.