Yeah, I'm pretty sure that it is the configuration of that lead wire that is causing the problem, and that you need to modify it slightly in order for the polarity to "match" rather the directly connect the +/-.

__________________
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1982 300D, anthracite grey, 260k miles, Greasecar
1999 E300D, black, 160k miles, Greasecar
2010 Honda Insight Hybrid
http://www.chuckwyatt.com
http://www.wordimpressive.com