Tell me about your ballast resistor failure.

Back in the 80s next door neighbor was out trying to start her dodge one morning. Was dying right after starting. I went to my car, pulled a ballast resistor & screwdriver out of my glove box. Asked her to open the hood. I swapped it out closed the hood & told her it was fixed. She didn’t believe me me until it started right up. One of the very few times in my life where I looked like a genius.....