Foggy on the details. Joined: Jun 13, Posts: 8, Profile Page. Dirty2 , Apr 10, Joined: Dec 9, Posts: 1, Profile Page. Morrisman , Apr 10, Joined: Dec 23, Posts: 57 Profile Page.
I would put one on anyway just to be safe, if your not going to race it you wont notice the difference anyway. BIG D. Big D , Apr 10, Joined: Sep 27, Posts: 1, Profile Page. Enbloc , Apr 10, Joined: Mar 2, Posts: 2, Profile Page. GM points ignition needs a resistor. From 55 to 60 they used a ballast resistor, Niehoff part number DR Later than that on some models. After that they used a resistance wire, white woven fiberglass insulation, with a purple and orange stripe on it.
They used that to 74, when everything changed to HEI. Take that number to NAPA, and they can cross it in the computer. As we know, fluorescent lighting is one of the popular and efficient lighting system.
However, there is downside to this type of lighting system. It gets heated very fast when directly connected to the voltage source. This happens due to the uncontrollable current draw by the lamp, as soon as it is switched on. In order to avoid the overheating due to the excessive current draw, a ballast resistor is used in the circuit, by connecting it in series with the lamp.
However, for the lamp to light up, it needs to establish an arc between its two electrodes. For this, a high starting voltage almost equal to the supply voltage is needed. The ballast resistor, supplies the needed voltage during the start up, and then immediately after the arc is established, it reduces the voltage in addition to regulating the current flow.
The figure below shows a florescent light tube connected with a ballast resistor and a starting switch. The ballast resistors are often included in the ignition kit of automotive machines such as car engines.
Due to its application, such devices are called Ignition Ballast Resistor. Use of this device reduces the risk of coil failure. It is installed in the circuit between the primary voltage source for the ignition coil and the coil stud. This helps to reduce the coil voltage and coil current, therefore with the addition of the same, the coil does not get as heated as it would without the same, thus increasing the life of the coil.
However, during the starting of the ignition engine, a high voltage equal to the primary voltage source is needed. Therefore a jumper wire is often connected with the ballast resistor. This jumper wire provides the necessary voltage to make the engine start. Image Credit — Atomic4.
Thus to avoid the same, connecting a ballast resistor in series with the lamp is highly recommended. Connecting the ballast resistor in this way reduces the voltage across the LED to its tolerable value.
The figure below shows the circuit diagram of the same. How to Wire 12 Volt Coils Disconnect the black negative cable on the negative post of the battery. Look at the ignition coil. Connect one end of the spark plug wire to the large center terminal of the ignition coil. Connect the positive terminal of the ignition coil to the "On" terminal of the ignition switch.
This task is performed by the engine's ignition system that includes components such as the battery, ignition key, ignition coil, triggering switch, spark plugs, and engine control module ECM.
Check sticker on the backside of module " Ignitor by PerTronix " If the Sticker is shriveled up, wrinkled, cracked, or if you see any burn marks on that side of module the unit over heated and failed for various reasons. Ballast Resistor in Fluorescent Lamps However, there is downside to this type of lighting system. It gets heated very fast when directly connected to the voltage source.
This happens due to the uncontrollable current draw by the lamp , as soon as it is switched on. Connect a wire from the coil positive terminal to one side of the ballast resistor. Connect 12 volts to the other terminal of the resistor. Install the high voltage coil wire. If your distributor is located near the front or side of the engine in the case of an inline-4 cylinder, then it's probably right near the ignition coil or distributor. Connect your multimeter to the positive terminal or pin of your coil , and to the high output terminal that goes to the spark plug.
Most ignition coils should have a secondary resistance falling somewhere between 6, to 10, ohms;however, refer to manufacturer specifications for the correct range. Strip the end of the positive wire from the ignition, and connect it to the positive end of the resistor. From the other terminal on the resistor a wire goes to the positive on the coil. Make sure to attach securely to the connecting terminal, by wrapping the wire around the post and tightening with a screwdriver.
In other words if the alternator has an internal resistor then you would use an external resistor coil. Once the voltage is stepped up, it goes to the secondary circuit which then directs the charge to the correct spark plug at the right time. External Resisted Ignition Coils have an internal resistance of 1. The top photo is a non - ballast coil. The difference is the ballast is built into the wire to ensure the voltage is reduced from 12 volts by the time it reaches the coil.
The second wire comes directly from the starter and jumps the ballast resistor. This wire is only powered when the starter is being run.
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