Your car quit while you were driving down the road what could it be?

I had the same thing happen to me in my '78

Ford Ranger... I checked and replaced everything ppl told me it could be. It ended up being a three dollar fusible link. I'm not sure if all vehicles have one or not but I'd check that out, could save u a lot of time and money. My friend figured out that was the problem when he could start the truck by jumping the solenoid.