Ok, It seems to be working now. I removed the light as suggested and it worked fine, when I reinstalled it the other side stopped working!Removed that side and IT worked fine! Both are working now but as I did not change anything I'm not sure why or for how long.The instructions state that if the metal frame of side marker touches the body, the light won't work, it doesn't, but the screw that holds the light would seem to provide a path from frame of light to body.Not being familiar with electrical theroy, I'm puzzled. Anyone have any thoughts on this? Arne, I just noticed that you list 12746 in your info, Thats only 5 away from mine! What colour was it? Mark