went into the drivers side housing before i read this today...
found what i thought was the brake light wire,with the tester,and then tried the 3rd brake light and the dang thing started blinking when i hit the flashers like you said....
i dont understand what causes it to do that....
what makes this taillight setup so differant....
tieing in to the trailer wire for the brake light won't work..
I thought I would just solder in a wire before the connecter on the back of the bumper....
i just hate to have to run a wire from the pedal all the way back there for the brake light....
I call the cap place tommorrow and see what they say....maybe thats why i got a better price....