I purchased three Athearn SD45T-2 locomotives from my local hobby shops because they are so Southern Pacific prototypical.The directional headlight lighting in these units does not operate the same on each unit going forward and backward, or from unit to unit. On the first two SP units the rear headlight pair come on before the locomotives start to creep backwards, which is great. However, the front headlights need more track voltage to illuminate, at which time the locomotives are already traveling forward. On the third unit, SSW9372, the locomotive requires considerably more voltage applied to the tracks than the other two units to get the front headlights to illuminate (by then the SSW locomotive is racing around the tracks). The rear headlight illuminates at a fairly low voltage, but not before the locomotive has started to move. Has anyone else noticed this operation or is it unique to my units? This is certainly not the way my Atlas units work. They light before the locomotive creeps, in either direction. I am considering removing the bulb wires from the circuit board and wiring all six bulbs in series with electrical pick-up and return through the trucks. Having front and rear headlights on all the time is better than what I have now. Anyone have an opinion on whether that would work? I don't know the electrical layout of the circuit board and am wondering if removing these wires would mess up any other functions on the board? I haven't looked inside yet, but are there good places on the trucks to pick-up and return the voltage, like on a standard Athearn truck? Thank you very much for you comments, hopefully helpful.