Originally Posted by
noglider
Thanks for all this. I'm with you so far.
I'm under the impression that the new stuff doesn't ground to the frame intentionally but might accidentally so that would be one reason you have to keep track of polarity. Is that right?
FWIW, the front light has no polarity indicators and is clearly not grounded to anything (plastic mounting bracket). The rear light has polarity markings and has bolts coming out of the casing that could get grounded.