Ballast Resistor

On a 1974, you have one more electrical gremlin lurking - the dreaded seatbelt sarter interock. If that goes bad, you have lights, radio, but no crank. It will start with the relay jump. I by-passed the one on my Charger for that very problem. Took 3 days of hunting and cussin!!! LOL I think the module was behind the glove box on the Charger.