Re: 41 Mercury - Tail lights not working!
Check the wires at the left rear corner of the frame where the tailamp wires join together for the crossover harness. With the light switch on see if you have "fire" in the main tailamp wire. If you had wiring under the dash that was frayed and losing insulation, I suspect the wires under the car are probably a lot worse. If the car has the original harness the wiring is 75 years old. You are long overdue for new wiring and have the potential for a wiring fire.
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