4 Pin Flasher Relay Wiring Diagram – A Complete Guide

If you are looking for a complete guide on 4 pin flasher relay wiring, then you have come to the right place. In this article, we will discuss everything you need to know about wiring a 4 pin flasher relay. We have included beginner-friendly explanations, diagrams, tables, and FAQs to help you understand the process easily.

What is a 4 Pin Flasher Relay?

A 4 pin flasher relay is an electronic device used to control the flashing of turn signals and hazard lights in vehicles. It is a crucial component in the circuit that powers the lights and provides a rhythmic flashing pattern that can be easily seen by other drivers on the road.

The 4 pin flasher relay consists of four pins that are used to control the flow of electricity through the circuit. These pins are labeled as P, L, X, and S.

  • P – This pin is used to connect the flasher relay to the positive (+) terminal of the battery.
  • L – This pin is connected to the load or the turn signal bulbs.
  • X – This pin is not used and is left unconnected.
  • S – This pin is connected to the switch or the turn signal lever.

The flasher relay works by interrupting the flow of electricity to the turn signal bulbs, which causes them to blink on and off. The rhythmic blinking pattern indicates the direction of the turn and helps other drivers on the road to anticipate your next move.

How to Wire a 4 Pin Flasher Relay?

Wiring a 4 pin flasher relay is a simple process, and can be done by following these steps:

  1. Locate the flasher relay in your vehicle. It is usually located under the dashboard or near the fuse box.
  2. Disconnect the negative (-) terminal of the battery to prevent any electric shock or short circuit.
  3. Identify the pins on the flasher relay as P, L, X, and S.
  4. Connect the P pin of the flasher relay to the positive (+) terminal of the battery.
  5. Connect the L pin of the flasher relay to the load, which is the turn signal bulbs.
  6. Leave the X pin unconnected.
  7. Connect the S pin of the flasher relay to the switch or the turn signal lever.
  8. Reconnect the negative (-) terminal of the battery.
  9. Test the turn signals and hazard lights to ensure they are working properly.

4 Pin Flasher Relay Wiring Diagram

Here is a wiring diagram for a 4 pin flasher relay:

Pin Description Connection
P Battery Positive (+) Connect to the positive (+) terminal of the battery
L Load (Turn Signal Bulbs) Connect to the turn signal bulbs
X Not Used Leave unconnected
S Switch (Turn Signal Lever) Connect to the turn signal lever

4 Pin Flasher Relay FAQ

What is the difference between a 2 pin and 4 pin flasher relay?

A 2 pin flasher relay is used for simple on/off flasher operations, such as a single bulb or LED. A 4 pin flasher relay is used for more complex flashing patterns, such as those used in turn signals and hazard lights.

How do I know if my flasher relay is bad?

If your turn signals or hazard lights are not flashing properly, it may indicate a faulty flasher relay. You can check the relay by swapping it with a known working relay or by using a multimeter to test for continuity.

Can I use a 3 pin flasher relay instead of a 4 pin flasher relay?

No, a 3 pin flasher relay is not compatible with the wiring of a 4 pin flasher relay. You must use a 4 pin flasher relay for turn signals and hazard lights.

Can I install a flasher relay myself?

Yes, wiring a flasher relay is a straightforward process, and can be done by following the steps mentioned above. However, if you are unsure about the process, it is best to seek professional help.

Do I need a flasher relay for LED turn signal bulbs?

Yes, you will need a special LED flasher relay that is designed to work with LED bulbs. This is because LED bulbs have a different resistance compared to traditional bulbs, which can cause issues with the flasher relay.

Conclusion

Wiring a 4 pin flasher relay is a simple process that can be done by following the steps mentioned in this article. We hope that this guide has helped you understand the process and resolve any issues you may have had with your turn signals or hazard lights.

Remember to follow safety precautions while working with electricity and always seek professional help if you are unsure about the process.