✔ Purpose Of Ballast Resistor On Coil

First the ballast resistor is the long white ceramic thing attached to the left side of the coil assembly. Ignition coil testing duration.

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Installed on engine firewall or on coil.

Purpose of ballast resistor on coil. What is a ballast. Why do some ignition systems have a ballast fitted where others do not. A ballast resistor is a device in your vehicle that limits the amount of current in an electric circuit.

The ballast resistor then functions to regulate the voltage going to the ignition system to avoid additional wear on the system. 14 ohm heavy duty external ceramic ballast resistor installed between coils terminal and condenser or hotspark ignitions red wire. Quite simply it is a resistor that has the purpose of reducing the voltage to the coil.

Lowers amperage to points or ignition module ensuring trouble free operation. This video explains how the ballast resistor works. After ignition the alternator begins to recharge the battery restoring the regular voltage.

The ballast resistor is a resistor contained in the primary ignition circuit wiring that lowers voltage after the engine is started to reduce wear on ignition components. This simple system is easy for even the novice mechanic to wire. In simple terms the ballast resistor in a mopar limits the amperage or current flow through the coil while the engine is running thereby extending the life of the coil and breaker points of.

Over time the ballast resistor can be damaged by normal wear and tear. For additional how to tutorials visit our website. At a 9 volt level the ignition points will survive for a longer time before pitting and burning.

The ballast resistor is commonly found in older vehicles because they did not have the benefit of circuit boards found in most of todays vehicles. The job of the ballast resistor was to inhibit current to a level that would not overheat the coil. The typical automotive ignition system prior to 1974 consisted of a coil and ballast resistor with breaker points to interrupt the current flow when a spark was needed.

On a point ignition system the resistor will reduce the incoming voltage to the coil from 14 volts when the charging system is active to about 9 volts. The ballast resistor allows the ignition system to operate at a lower voltage until the engine starts.