How long does a ballast resistor last?

Ballast resistance is a component of the ignition system of older cars. If you drive classics, you are familiar with coils and dots. You don't have an onboard computer and apparently no circuit boards that can control the voltage when the engine starts. This is where the ballast resistor comes into play. It's actually kind of like a huge fuse that sits between the positive battery cable and the ignition switch, and it works to reduce the voltage applied to the coil so it doesn't burn out. outside. When you start the engine, the ballast resistor supplies the coil with normal battery voltage to start the engine.

If the original ballast resistor still works in your classic car, then you are a very lucky driver. Because the ballast resistor consumes so much heat during normal operation, it is vulnerable to damage and eventually wears out. How often you drive may be a factor, but there is no specific “best before” date. Ballast resistance can last for many years, but it wears out a lot and can suddenly fail. Your ballast receiver needs to be replaced if the engine starts but stalls as soon as the key is returned to the "run" position.

If your ballast resistor fails, you will have to replace it. Resist the temptation to listen to well-intentioned classic car enthusiasts who might suggest jumping over the resistor. If you do, your glasses will eventually burn out and require costly repairs. A professional mechanic can replace the ballast resistor and your favorite classic will work fine again.