Neutral Safety Switch wiring

What year is your car? Do you know if your side marker lamps are the type that flash with the signals? (They would have two INSULATED connections, and no ground)

Detail how your side marker lamps are hooked up, and do they work?

Is it possible that you have wrong bulbs in the signal/ stop lamps? What are the bulb no's?

Its a 1971 demon. The side markers have one weatherpack connector each, with 2 wires a piece. I don't even have the side lamps hooked up at all! Never got that far. It occured to me that I might have the wrong bulbs a few days ago. They are 1157's. But the harness does the same thing when I hook up some LED lights that I fitted in the grille. So I don't think its the bulbs.