Here is a video that shows how to test if your car has ballast resistor. Engineers often need to connect LEDs in parallel so they add a ballast resistor in series with each LED to minimize currrent ...

One of the questions we're often asked about Mopar ignition systems is whether or not the ballast resistor is a necessary item. In fact, there seems to be a lot of mystery surrounding this part ...

You can use a test light or voltmeter to see if your ... with the new 12-gauge ignition-feed wire and eliminate the ballast resistor. It’s important to match the ignition coil and control ...