Is the splicing you're writing about for the turn signal indicator? On our bikes that lamp isn't the same as the rest and is run by the two hot leads in the turn lamp circuit. I had to construct a dual LED indicator (from a couple of single ended super brights) with the polarity of each in the opposing direction to get it to work properly. Kind of a poor man's Sandman kit without his nice neat circuit board (follow Moe's link).
