Quote:
Originally Posted by strictlypersonl
The 3-wire tail lights are original, the 4-wire units are proprietary to Superformance. Original cars used a relay on the firewall to merge the brake and signal inputs. Some trailer relays can do the same thing.
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This unit from U-Haul would work - it converts separate turn (L,R) and stop signal input into combined left stop/turn and right stop/turn. Should work for all vehicles originally equipped with incandescent bulbs.
https://www.uhaul.com/MovingSupplies...Flat/?id=13684