@Mike CT posted:The modular end, that connects the two marker light wires, to the board. Left wire/Right wire. There is a clip that requires a small metal blade, exacto-knife to release.
Mike—that was certainly the problem. There were two sets of purple wires (one set for each set of marker lights) that plugged into the motherboard. I swapped the wires around in each plug and now I’m in business with working marker lights again! Thanks so much!