Why are the car's turn signals not working?

[LeKylie]

If the car's turn signals are not working, it may be due to a burnt-out turn signal relay or a blown turn signal fuse. These two factors are the main reasons for malfunctioning car turn signals. While the turn signal relay can be replaced by yourself, the fuse should be replaced by a professional to avoid causing more serious car issues. Below is an introduction to car turn signals: 1. Car Turn Signals: Car turn signals are flashing indicators that activate when the vehicle is turning, alerting pedestrians or vehicles in front or behind about the intended direction of travel. 2. Principle: The light tube uses a xenon lamp, controlled by a microcontroller circuit for alternating left-right flashing operation. The flasher unit, depending on its structure, can be categorized into three types: resistance wire type, capacitor type, and electronic type.

[McDiana]

I've been driving for many years, and the issue of turn signals not lighting up is quite common. The most frequent cause is a burnt-out bulb. Older cars are prone to this, as prolonged vibration and high temperatures can break the filament. First, check if the bulb is indeed faulty; if so, replacing it with a new one usually solves the problem. Another possible reason is a blown fuse, especially in the fuse box under the steering wheel—look for the corresponding fuse. Poor wiring connections should not be overlooked either; loose or aged plugs causing short circuits can make the light flash once and then go out. There's also the issue of the turn signal switch itself; worn contacts can break the circuit, causing the light to fail. Don't ignore safety—driving without functioning turn signals can lead to accidents. Pull over immediately to inspect or visit a repair shop. Regular maintenance, such as cleaning the bulb socket and checking the wiring, can prevent most faults. Developing this habit can save you a lot of trouble.

[JoyLee]

Last time when I was sending my family off on a long trip, the turn signal suddenly stopped working, which really gave me a scare. Safety first—I had to turn on the hazard lights and pull over to avoid being rear-ended. The cause is usually a simple issue: a burnt-out bulb, a blown fuse, or corroded wiring contacts. Especially on rainy days, short circuits are more likely to occur. I once experienced flickering lights due to unstable voltage, which required checking if the alternator and battery were functioning properly. My personal suggestion is to first try replacing the bulb yourself for testing; if that doesn’t work, get a professional to check the circuit continuity. Make it a habit to inspect your turn signals monthly to ensure they’re reliable in critical moments. Don’t delay too long, or a minor issue could turn into a major repair.

[MilaRose]

I was really nervous when the turn signal didn't work just after starting the car. My friend taught me to first check if the bulb was burnt out—open the lamp cover and inspect whether the filament was broken. It's usually simple; replacing the bulb often fixes it. If not, the fuse might be blown; try replacing one in the car's fuse box. If it still doesn't work, there might be a short circuit or an open circuit in the wiring, requiring tools to test continuity. For safety, don't force it; take it to a repair shop. As a preventive measure, regularly clean dust buildup in the lamp socket.

[LaBrandon]

I often study automotive circuits. The reasons for turn signal failure can be complex: burnt-out bulbs are most common, but relay coil failure or stuck contacts can interrupt the signal. Aging wiring causing short circuits can blow fuses, especially in high-temperature areas like the engine compartment. Internal wear in the turn signal switch may prevent contact engagement. Improper modifications, such as overloading with added electrical devices, are also frequent issues. It's recommended to use a multimeter to check continuity and relay operation, with professional maintenance being more reliable. Prevention: Avoid frequent light switching and conduct regular inspections of wiring waterproofing.