What is a Flasher Relay?
A flasher relay is an electromagnetic switch that controls the blinking of turn signals and hazard lights in vehicles. It allows the lights to turn on and off at a consistent interval, creating the flashing effect. The flasher relay is crucial for safety, ensuring that other drivers are alerted when a vehicle is signaling a turn or a stop.
Understanding the 5 Pin Flasher Relay
The 5 pin flasher relay is a type of flasher relay that has five terminals, each serving a unique purpose in the operation of the turn signal and hazard light system. Below are the primary functions of each pin:
- Pin 1 (Power Input): This pin connects to the battery's positive terminal, providing power to the relay.
- Pin 2 (Ground): This pin connects to the vehicle’s chassis or ground, completing the electrical circuit.
- Pin 3 (Load Output): This pin connects to the turn signal lights, controlling their operation.
- Pin 4 (Turn Signal Input): This pin receives input from the turn signal switch.
- Pin 5 (Hazard Input): This pin connects to the hazard light switch, allowing simultaneous operation of all turn signals when activated.
How Does a 5 Pin Flasher Relay Work?
The operation of a 5 pin flasher relay is based on an electromagnetic principle. When the turn signal switch is activated, it sends voltage to the relay. The relay then opens and closes the circuit, allowing current to flow to the turn signal lights intermittently. This creates the flashing effect.
When you activate the hazard lights, the relay receives input from the hazard switch, and all turn signal lights flash simultaneously. The 5 pin design allows for this dual functionality, making it a versatile component in automotive electrical systems.
Wiring Diagram for a 5 Pin Flasher Relay
To effectively wire a 5 pin flasher relay, you need to understand the connections required for proper functionality. Below is a detailed wiring diagram and explanation for connecting a 5 pin flasher relay.
Wiring Diagram
Here’s a simple representation of the wiring connections:
```
+-------------------+
| |
| 5 Pin Relay |
| |
| 1 | 2 | 3 | 4 | 5 |
| |
+-------------------+
```
- Pin 1 (Power Input): Connect to the positive terminal of the vehicle’s battery.
- Pin 2 (Ground): Connect to the vehicle’s chassis to provide a ground connection.
- Pin 3 (Load Output): Connect to the turn signal lights (left or right side).
- Pin 4 (Turn Signal Input): Connect to the turn signal switch on the steering column.
- Pin 5 (Hazard Input): Connect to the hazard light switch.
Step-by-Step Wiring Instructions
Follow these steps for a successful wiring installation of the 5 pin flasher relay:
- Gather Tools and Materials: You will need a 5 pin flasher relay, wire connectors, a multimeter for testing, and basic hand tools (screwdriver, wire stripper, etc.).
- Disconnect the Battery: Safety first! Always disconnect the negative terminal of the battery before starting any electrical work.
- Identify the Wires: Locate the wires for the turn signal and hazard switches in your vehicle.
- Connect the Relay: Using the wiring diagram, connect each pin of the relay to the corresponding wires.
- Pin 1 to battery positive (fuse protected).
- Pin 2 to ground.
- Pin 3 to the left or right turn signal lights.
- Pin 4 to the turn signal switch.
- Pin 5 to the hazard switch.
- Double-Check Connections: Ensure all connections are secure. Use a multimeter to check for continuity.
- Reconnect the Battery: Reattach the negative battery terminal.
- Test the System: Activate the turn signals and hazard lights to ensure proper functionality.
Troubleshooting Common Issues
Even with proper wiring, you may encounter issues with your 5 pin flasher relay. Here are some common problems and their solutions:
- Turn Signals Not Flashing: Check the connections, especially the input from the turn signal switch. Ensure the relay is functioning correctly.
- All Lights Flashing Together: If both turn signals flash simultaneously, there may be a short circuit. Check the wiring connections to the relay.
- Relay Clicking but No Light Activity: This could indicate a bad relay or a blown fuse. Replace the relay or check the fuses in the circuit.
Conclusion
Understanding the 5 pin flasher relay wiring diagram is crucial for maintaining a safe and functional vehicle lighting system. By following the wiring instructions and troubleshooting tips provided in this article, you can effectively install or repair your flasher relay with confidence. Whether you’re replacing a faulty relay or upgrading your vehicle’s lighting system, this knowledge empowers you to tackle automotive electrical projects with ease. Always remember safety first, and if in doubt, consult a professional.
Frequently Asked Questions
What is a 5 pin flasher relay used for?
A 5 pin flasher relay is commonly used in automotive applications to control the blinking of turn signals and hazard lights.
How do I identify the pins on a 5 pin flasher relay?
Typically, the pins are labeled as follows: 30 (power), 31 (ground), 49 (output), 49a (output for hazard lights), and 15 (input for the turn signal switch).
What is the wiring diagram for a 5 pin flasher relay?
The wiring diagram shows connections from the battery to pin 30, ground to pin 31, turn signals to pin 49, and the hazard switch to pin 49a.
Can I use a 5 pin flasher relay in place of a 4 pin relay?
Yes, but it may require additional wiring since the 5 pin relay has an extra output for hazards, which a 4 pin relay does not.
What happens if I wire the flasher relay incorrectly?
Wiring the flasher relay incorrectly may cause the turn signals to not work, blink at the wrong rate, or not blink at all.
How do I test a 5 pin flasher relay?
You can test a 5 pin flasher relay by applying power to the appropriate pins and checking for a blinking output at the turn signal pin.
What tools do I need to wire a 5 pin flasher relay?
You'll typically need wire strippers, crimping tools, connectors, a multimeter, and possibly a soldering iron.
Are there different types of 5 pin flasher relays?
Yes, there are electromechanical and electronic types of 5 pin flasher relays, which may have different wiring requirements.
Can I use a 5 pin flasher relay with LED turn signals?
Yes, but you may need a load resistor or a specific LED-compatible relay to ensure proper functionality.
Where can I find a 5 pin flasher relay wiring diagram?
You can find wiring diagrams in the vehicle's service manual, online forums, or automotive repair websites.
