Flasher

Flasher

A flasher is a device used in automotive lighting systems to control the operation of turn signals and hazard warning lights. It is an essential component in ensuring the proper functioning of a vehicle's signaling system, providing both safety and communication to other drivers on the road.

Function

The primary function of a flasher is to intermittently interrupt the electrical current flowing to the turn signal bulbs, causing them to flash on and off. This flashing action is what alerts other drivers to the vehicle's intended direction of travel or the presence of a hazard. Flashers are typically designed to operate at a specific flash rate, usually around 60 to 120 flashes per minute.

Types of Flashers

There are several types of flashers used in automotive applications:

• Thermal Flashers: These are the most traditional type of flashers, which use a bimetallic strip that heats up and bends to make and break the electrical contact, causing the bulbs to flash.
• Electromechanical Flashers: These flashers use a relay and a resistor to control the flashing of the turn signals.
• Electronic Flashers: Modern vehicles often use electronic flashers, which rely on solid-state components to control the flash rate. These are more reliable and can handle a wider range of bulb types, including LEDs.

Common Issues

Flashers can sometimes fail or malfunction, leading to issues such as:

• Rapid Flashing: This often indicates a burned-out bulb or a problem with the flasher unit itself.
• No Flashing: This can be caused by a blown fuse, a faulty flasher unit, or a wiring issue.
• Inconsistent Flashing: This may be due to a poor connection or a failing flasher unit.

Replacement and Maintenance

Replacing a flasher unit is generally straightforward and can be done with basic tools. It is important to use the correct type of flasher for the vehicle, as using an incompatible unit can lead to improper operation of the turn signals.

Related Pages

• Automotive lighting
• Turn signal
• Hazard warning lights
• LED
• Relay