When it comes to the ignition system of an internal combustion engine, the points distributor plays a crucial role in ensuring that the spark plugs fire at the right time. The points distributor is responsible for generating the high voltage that is needed to ignite the fuel in the combustion chamber. However, the proper functioning of the points distributor is dependent on how it is wired. In this journal article, we will discuss the points distributor wiring diagram and provide a comprehensive guide on how to properly wire it.
What is a Points Distributor?
Before we dive into the wiring diagram, let us first understand what a points distributor is. A points distributor is a type of mechanical ignition system that was used in older vehicles. It consists of a rotating arm and a set of stationary contacts, commonly referred to as points. The points distributor is responsible for regulating the timing of the spark that ignites the fuel in the combustion chamber. The arm of the points distributor rotates and makes contact with the points to create a spark at the right time.
Although points distributors are becoming less common in modern vehicles, they are still used in some classic and vintage cars. Knowing how to wire a points distributor is, therefore, a valuable skill for anyone who owns or works with such vehicles.
Understanding the Points Distributor Wiring Diagram
The points distributor wiring diagram is a schematic diagram that shows the wiring connections of the various components of the points distributor. The wiring diagram typically consists of four main components:
- The power source or battery
- The ignition switch
- The coil
- The points distributor
Each component has its own wiring connections, and the diagram shows how they are connected to each other to form a complete circuit. The wiring diagram is usually found in the vehicle’s repair manual or can be obtained online.
Wiring the Power Source or Battery
The power source or battery is the first component in the points distributor wiring diagram. It provides the electrical energy that is needed to power the ignition system. The positive terminal of the battery is connected to one side of the ignition switch, and the other side of the switch is connected to the coil. The negative terminal of the battery is connected to the chassis or ground of the vehicle.
Wiring the Ignition Switch
The ignition switch is the component that turns the ignition system on and off. It is a simple on-off switch that is operated by the vehicle’s key. The ignition switch is connected to the positive terminal of the battery on one side and to the coil on the other side. When the key is turned on, the switch closes, and the coil is energized, creating a spark at the points distributor.
Wiring the Coil
The coil is the component that converts the low voltage from the battery into the high voltage that is needed to create a spark at the points distributor. The coil has two terminals, a primary terminal and a secondary terminal. The primary terminal is connected to the ignition switch, and the secondary terminal is connected to the points distributor.
Wiring the Points Distributor
The points distributor is the final component in the points distributor wiring diagram. It consists of a set of points that are connected to the secondary terminal of the coil and a rotating arm that makes contact with the points. When the arm makes contact with the points, it closes the circuit and creates a spark at the spark plugs, igniting the fuel in the combustion chamber.
Wiring the points distributor requires careful attention to detail. Each wire must be connected to the correct terminal, and the connections must be tight and secure. Any loose or incorrect connections can result in a poorly functioning ignition system.
FAQs
1. What are the common problems associated with points distributors?
Points distributors are prone to wear and tear over time, which can cause them to malfunction. The points can become pitted or corroded, leading to poor contact with the rotating arm. This can result in a weak spark or no spark at all. Additionally, the distributor cap and rotor can become worn or damaged, affecting the performance of the ignition system.
2. Can a points distributor be replaced with an electronic distributor?
Yes, it is possible to replace a points distributor with an electronic distributor. Electronic distributors use a pickup coil and electronic control module to regulate the timing of the spark. They are more reliable and require less maintenance than points distributors.
3. Can I still drive my car if the points distributor is not working?
No, you should not drive your car if the points distributor is not working. A malfunctioning points distributor can cause engine damage or even a fire. If you suspect that your points distributor is not functioning properly, have it inspected by a professional mechanic.
4. How often should I replace the points in my points distributor?
It is recommended that the points be replaced every 10,000 to 12,000 miles or once a year, whichever comes first. If you notice any signs of wear or corrosion on the points, they should be replaced immediately.
5. How do I adjust the timing of my points distributor?
Timing adjustments on a points distributor can be made by rotating the distributor housing. The timing should be set according to the manufacturer’s specifications, which can usually be found in the vehicle’s repair manual.
| Component | Wiring |
|---|---|
| Battery | Positive terminal connected to one side of the ignition switch, Negative terminal connected to the chassis or ground |
| Ignition Switch | One side connected to the positive terminal of the battery, other side connected to the coil |
| Coil | Primary terminal connected to the ignition switch, secondary terminal connected to the points distributor |
| Points Distributor | Connected to the secondary terminal of the coil, rotating arm makes contact with the points to create a spark |
