I installed a reversing loop on my layout, but I get a short as soon as I plug in my Prodigy Express DCC. I am attaching a crude drawing of the part of the layout where I have the reversing loop. I have installed insulated connectors at numbers 1, 2, 3, & 4. I wired in the MRC Auto Reverse Module on both sides where I have the #1 insulated connectors. The red wires are on the right side and the yellow wires are on the left side. I hope my drawing gets attached to this post.