I just studied the lighting circuit for these and am a bit confused. The ckt contains 8 incandescent bulbs in series. But there's another ckt located half-way between the 8. Here there's a parallel ckt, each leg of which contains 2 diodes in series, the 2 in one leg pointing one direction and the 2 in the other leg pointing in the opposite direction. As I see it, except for the ~ 1.4 voltage drop thru each pair, the 2 pairs tend to 'cancel' each other......It seems that this 1.4 voltage drop MAY be used to light the 2 marker lamps.
To me, it's a confusing ckt! Can anyone explain its real purpose?
