"Byp a weighing machine" Guilty or not?

I am a big rig truck driver. I was pulled over the other day about 30 minutes past a highway weigh scale. The officer suggested a had driven past while the lights were flashing, signaling trucks to pull in to the scale. I drive past this and many scales regularly in my weekly work travels as well as for nearly 20 years of my civilian life and have never seen these lights on at any scale, though i always see the sign, read it and look at the lights. The signs are about 12 feet wide and 4 feet tall so they are hard to miss. I am not an owner operator so have no financial motive to avoid a weigh scale. I am asking professionals, officers, truckers and anyone to sound of as to their opinion on this matter. Admittedly we all make mistakes, though professionals like police officers do also.I ask everyone, Is there any chance the officer could have been mistaken as to his turning on the lights, Is it possible that the officer was unaware of an intermittent electrical connection within the switch for these lights, Is it at all possible that these lights were not entirely visible from the highway, is it possible that this sign was blocked by traffic that i was ping near that time. I would love to have at least 12 individuals sound off, does the above information create any doubt as to the charge? Thanks to all who reply