Hi Lego train enthusiests. My name is Sandy and I live in Central Florida, USA. I've recently converted a Lego Santa Fe loco from 9v to PF. I have a question concerning lighting the loco with a lego electric light brick and using power function cables to power it. I read somewhere where the power function extention cable was backward compatible but I don't see how based on the lego# 8871 cable I have. Any help with this would be greatly appreciated. Thanks and Happy Holidays to all.