Thank you to all that responded. I'll give more info - purchased on ebay - listed as regular loco not dcc. The wiring on the circuit board is as follows 2 red wires, 2 blavk, 1 green and 1 orange. I'm not suree which wire to eliminate. I assume I need the 2 red and 2 black, not sure about the other green and orange. Any assistance would be greatly appreciated

I have a item 60807 - ho gp 30 diesel loco - dcc equipped that will not run on dc track, how do I convert it to work. have read several on line articles but none of them seem to match this loco. please help