LED flasher relays and control units – Tractor & utility vehicle

A LED flasher relay is an electronic component that regulates the flashing frequency of your vehicle’s turn signals. It replaces the original relay, designed for filament bulbs, which does not work properly with low-consumption LEDs. Without a suitable relay, LED turn signals flash abnormally fast (hyperflash), which is dangerous and can lead to a refusal at the technical inspection. The LED relay maintains a regular rate of 60 to 120 cycles per minute, in compliance with regulations.

To identify the number of pins, locate your original flasher relay (generally under the dashboard or in the fuse box) and count the connectors. Motorcycles and scooters mostly use 2-pin relays. Cars and vans are most often equipped with 3-pin models. 4- and 5-pin relays are found on some vehicles with an audible signal or integrated hazard lights. If in doubt, consult your vehicle’s technical manual or contact AGM Vision customer service with the make and model of your vehicle.

Yes, most of the LED flasher relays offered by AGM Vision are universal and work just as well with LED bulbs as with classic filament bulbs. This allows a gradual transition: you can install the LED relay and replace the bulbs one by one, without any compatibility issues. The relay automatically adjusts the flash rate based on the detected electrical load. Some models even offer an adjustable frequency to suit all turn signal configurations.

Installing a LED flasher relay is simple and requires no specific tools. Locate the original relay in your vehicle (under the dashboard, behind the fuse box, or under the seat for motorcycles). Unplug the old relay by pulling on the connector, then push the new LED relay onto the same connector. The operation generally takes 5 to 10 minutes. Then test the left and right turn signals, as well as the warnings, to check that everything is working properly. No wiring modification is required.

The rapid flashing (hyperflash) after switching to LEDs is caused by the vehicle’s original flasher relay. This relay works by load detection: when consumption drops (LEDs consume 5 to 10 times less than conventional bulbs), it interprets this as a burned-out bulb and speeds up the rate to alert the driver. The solution is to replace the relay with a LED-compatible model or to add load resistors. The LED relay is the cleanest solution, because it does not generate additional heat, unlike resistors.

A quality LED flasher relay has a service life that generally exceeds that of the vehicle. Unlike conventional thermal relays, which wear out through repeated heating/cooling, LED relays use an electronic circuit that does not wear out mechanically. They typically withstand more than 500 000 cycles of switching. The operating temperature ranges from -40 °C to +85 °C, covering all climatic conditions. The relays sold by AGM Vision are endurance-tested and come with a manufacturer’s warranty.

Hyper-flashing (or hyper-flash) occurs when you replace halogen bulbs with LEDs without modifying the flasher unit. The circuit detects the low consumption of LEDs (3-5W versus 21W for halogen) and interprets it as a burnt-out bulb, triggering a rapid warning flash. The solution is to replace the original flasher unit with an LED-compatible relay, which correctly regulates the frequency. AGM Vision offers 2- and 3-pin relays in 12V and 24V to solve this problem.

The number of pins corresponds to the connector of your original flasher unit. The 2-pin relay (CF13 or EP27) is the simplest: it only manages the flashing signal. The 3-pin relay (CF14 or EP35) adds an output for the dashboard indicator light. To identify yours, locate the original unit (often behind the dashboard or under the steering wheel) and count the wires in the connector. At AGM Vision, each LED relay is supplied with the pinout diagram and the list of compatible vehicles.

Yes, a LED-compatible relay works perfectly with standard halogen bulbs. It regulates the flash rate independently of the bulbs’ power consumption. You can therefore install an LED relay and replace your bulbs gradually, or even temporarily mix LED and halogen. The flash rate remains stable between 60 and 120 cycles per minute, in accordance with regulations. It’s a practical solution if you want to switch your turn signals to LED without changing everything at the same time.

The location of the flasher relay varies depending on the vehicle. On most cars, it is located under the dashboard, behind the steering column, secured by a clip. On motorcycles, it is often under the seat or behind the side fairing. On vans and trucks, it may be found in the main fuse box. To locate it, turn on your turn signals and listen for the characteristic clicking: it comes from the relay. You can also consult the vehicle’s wiring diagram. Replacement is done by simply unplugging/plugging back in the connector.

Load resistors (load resistors) are an alternative to the LED relay, but they have major drawbacks. They work by converting the energy saved by the LED into heat, thus cancelling the advantage of low consumption. They heat up to over 100°C, which can damage surrounding cables and plastics. You need to install one per bulb (up to 4 on a vehicle). The LED flasher relay is the recommended solution: a single component, no heat, no overconsumption, and a simpler installation. AGM Vision always recommends the relay.

Installation takes about 5 to 10 minutes. Locate your original flasher unit (under the dashboard or in the fuse box). Unplug the connector from the original unit by pressing the locking clip. Plug the new LED relay into the same connector: it’s plug & play, the pins match directly. Secure the relay with the adhesive mount or the supplied clip. Test the left and right turn signals and check that the warnings also work. The frequency must be regular, without hyperflash.