[DIAGRAM] Advance Ballast Wiring Diagram Resistor

The ballasted ignition system uses a coil with half the primary resistance, 1.6 ohms, and a series connected ballast resistor with similar resistance, giving the same total resistance and same current draw. Electrical connections are shown above. Connect the ballast resistor between ignition switch and coil.. 1. Identify if the vehicle has a ballast resistor This can either be done by a visual check or using a multimeter; ballast resistors can take two main forms, you are looking for a ceramic block, often mounted to the coil but sometimes elsewhere like the inner front wing, or a resistive wire coming from the loom.

The job of the ballast resistor was to inhibit current to a level that would not overheat the coil. This simple system is easy for even the novice mechanic to wire. So if you have a classic car with missing ignition components, don't hesitate to replace the coil and ballast resistor yourself.. In a points type ignition, the ballast resistor would help to keep the spark down, and the coil from being burned up too quickly. Of course, this meant that there was going to be a little less power getting to the coil. Connecting a ballast resistor is a fairly straightforward project, but you will want to pay attention to the wiring.