Does anybody know how to revise the existing wire harness so that :
a) all 3 lamps on the left and right light up when the brake is pressed (instead of two)
b) the rear left 3 light up when left turn signal is activated (and with right...)
c) why Ford Mo Co chose to include 3 light bulbs, reflectors and wires yet only have two bulbs light up? Just trying to understand the reasoning.