Agree on that Ken. I have not done that yet. I DID get everything taped and ready for the shell but put it on the track first. Now I am doubly frustrated. For starters I realized I misspoke earlier. This is NOT a loco that I've had for while. This is one I bought at the Train show in February. Used but "like new" and appears to be not very old. Never had it on a track til last night so no clue on it's history. I just did a quick battery test on the incandescent light cause I could get at those wires easily. Nothing. Did a little more disassembly to get to the wires for the LED light, battery test, nothing. Was not terribly confident in the battery test in situ so went ahead and rewired to the white and yellow on the 6 pin connector, nothing. Rewired to the green and violet on the 6 pin, changed the wire selections on the button settings, nothing. Disconnected and removed both lights. Battery test on the bench with 3 different batteries, nothing. My conclusion at this point is something bad with both lights from it's former life. Perhaps why it was being sold. Just bad lights. So unless none of this battery testing is really valid I guess I now have another project - find new lights.