Coil Wiring 3 Wire Ignition Coil Diagram

If you’re having ignition problems with your vehicle, the ignition coil may be the culprit. Coil wiring is a crucial part of the ignition system, and understanding how it works can help you diagnose and fix problems. In this article, we’ll cover everything you need to know about coil wiring, including the 3 wire ignition coil diagram.

What is an Ignition Coil?

Before we dive into the wiring diagram, let’s first define what an ignition coil is. An ignition coil is a vital component of the ignition system that transforms the low voltage from the battery into high voltage that’s necessary to ignite the fuel in the engine. It does this by creating a magnetic field that generates the high voltage spark.

The ignition coil is made up of two coils of wire, primary and secondary. The primary coil is wrapped around the secondary coil, and a contact breaker interrupts the current flow in the primary coil, which induces a high voltage spark in the secondary coil. This spark then ignites the fuel in the engine to start the car.

3 Wire Ignition Coil Diagram

Now, let’s take a look at the 3 wire ignition coil diagram:

Wire Color Function
Black Ground
Green/Red Primary Circuit
Black/White Secondary Circuit

The black wire is the ground wire, which connects the ignition coil to the vehicle’s chassis. The green/red wire is the primary circuit wire, which carries the low voltage current from the battery to the ignition coil. The black/white wire is the secondary circuit wire, which carries the high voltage spark from the ignition coil to the distributor and spark plugs.

How to Wire a 3 Wire Ignition Coil

Wiring a 3 wire ignition coil is a simple process, but it’s essential to follow the wiring diagram to ensure proper installation. Here are the steps to wire a 3 wire ignition coil:

  1. Connect the black wire to the ignition coil’s negative terminal.
  2. Connect the green/red wire to the ignition coil’s positive terminal.
  3. Connect the black/white wire to the distributor and spark plugs.

FAQs

Q: How do I know if my ignition coil is bad?

A: If your car is having trouble starting, or if the engine is misfiring or stalling, it could be a sign that the ignition coil is bad. You can also use a multimeter to test the coil’s primary and secondary resistance to see if it’s within the manufacturer’s specifications.

Q: Can I replace the ignition coil myself?

A: Yes, you can replace the ignition coil yourself if you have some basic mechanical knowledge and the proper tools. However, if you’re not comfortable working on your car’s ignition system, it’s best to take it to a professional mechanic.

Q: What happens if I wire my ignition coil incorrectly?

A: If you wire your ignition coil incorrectly, it can cause serious damage to your car’s electrical system, including the battery and alternator. It can also cause the engine to misfire or not start at all.

Q: Can I test my ignition coil with a multimeter?

A: Yes, you can test your ignition coil with a multimeter to check its resistance. However, if the resistance is within the manufacturer’s specifications, it doesn’t necessarily mean the ignition coil is functioning correctly. It’s best to have a professional mechanic diagnose the problem if you’re unsure.

Q: How long do ignition coils last?

A: Ignition coils can last anywhere from 50,000 to 100,000 miles, depending on the make and model of your vehicle. However, it’s always best to follow the manufacturer’s recommended maintenance schedule to ensure your car’s ignition system is functioning correctly.

Conclusion

In conclusion, coil wiring is an essential part of the ignition system, and understanding the 3 wire ignition coil diagram can help you diagnose and fix problems. Remember to follow the wiring diagram when wiring your ignition coil and consult a professional mechanic if you’re unsure of anything.