<VV> LED tail lights

[Padgett]

Just for S&G, in the early 1970s GM was very concerned about the spiraling 
cost of copper. One of my projects at GMI was to figure out how many long 
runs of wire could be eliminated and got all of the long front to rear 
wiring down to two wires with pulse width modulation (instead of resistors) 
and diode steering (so the side marker and license plate lights would not 
pulse with the turn signals.

Then the price of copper stabilized, it was realized that trailer wiring 
would require relays or a special harness the length of the car (a popular 
and profitable option was a "towing accommodation package"), and the whole 
thing was shelved.

Padgett