http://www.ppdnmra.com/decoder-inst.pdf I followed this link with the Spectrum Dash 8, right down to using the same decoder I did do a few things different. Instead of drilling and tapping, I drilled the holes and soldered the power and ground to the holes instead of using a screw. Then I sort of reused the light circuit board. That circuit looked like this: (the RED things are the "WIPERS" that connect on the chassis to get power and ground) Then I modified it to this: The "blue" line is the wire that the directions said was the common and the "green" lines are each bulbs power according to the directions (Obviously the colors are not exact!) All went well. Put it back together but didn't put the shell on, put it on the track in DC mode. It wouldn't move unless I turned the motor then it would spin a bit and then stop. The rear light worked but not the front. I got it move a short distance so I put the DCC Control to "3" and it did the same thing. Would go a short distance and then just stop. Would only go "forward." Then after a bit of fiddling it ceased to do ANYTHING. The rear light would go on when I put the controller into "Reverse" but the front light wouldn't do anything and nor did it ever. Even if I turned the motor a bit, it still wouldn't move. So I gave up and took the decoder out and desoldered everything and essentially gave up. Does anyone know what I did wrong? It would be greatly appreciated, I would like to order the same decoder and give it a shot again.