Thanks to all who have helped me with my post...I got my engine running after I changed to the leading truck around on the tender. The engine is running fine now for me and I thank all of you who have given me tips and sugestions.

I did buy this used. There was a second plug that came in the box, it looks like it is a jumper plug. I did install this and the engine still won't run. I did not notice the headlight being on either. One thig that I did try was to remove the 2 prong plug from the tender to the engine. when this was removed, the overload light did not come on. I don't know if this is a result of the DCC Decoder or if ther is maybe something else that could be wrong.

I bought a #84103 K4 Pacific steam engine with DCC at a train show recently and have just tried to run it on my DC powered track. I have an older MRC Tech II 2800 power pack and when the throttle is increased, I get an overload light. What is causing this? I have taken the tender shell off and looked at wiring and everything looks like it is fine. I do not plan on running DCC and would like to make this one of my regular engines on my layout. Could someone help me figure out why my engine will not run.