What happens when a headlight is switched on low beam?
When the headlamps are switched on low-beam, the daytime running lamp relay coil is energized and the relay cuts the voltage-dropping resistor out of the circuit, thereby operating the low-beam bulbs at full voltage.
Is it safe to work on headlight assembly?
The chances of running into any issues while working on your headlight assembly are relatively low in comparison to a lot of other automotive procedures. However, it is still necessary to outline a few essential safety guidelines when operating on any vehicle. Your engine is hot. Wait for it to cool down before working on it in any way.
Why are my low beam lights not working?
If it works, the bulb simply needs replaced. The most common reason for faulty low-beam lights is a blown fuse. Check your car’s owner’s manual for information on how to access the fuses and where they are located. Check for melted wires leading to any of the fuses, and replace said fuses if necessary.
Why is the left low beam brighter than the right?
Since both low-beams are powered by the same pole of the headlamp switch and the left low-beam is bright while the right is dim, the problem is probably not in the headlamp switch. Since the headlamps are individually grounded and each headlamp has one bright filament, the problems are not likely to be on the ground side of the circuit.
Why are my low beam headlights not working?
If a headlight fuse blows, it could cause the headlights to stop working. Most headlight systems are also designed with a relay that switches the power between low beam and high beam headlights. If this relay goes bad, it could allow power to the high beams, but not the low beams.
What to do if your headlight is not working?
If one or both headlights don’t work after you replace the bulbs, check the fuses. The low beams and high beams have their designated fuses for each of the circuits. In some car models, you will have a separate fuse for the left and right low beams. Locate the fuse box under the engine and by the dashboard.
What to do if your low beams don’t work?
Either way, if your low beams aren’t working but your high beams are, the first things we check are the bulbs. If you’re thinking of replacing the headlight bulbs yourself, make sure you’re familiar with the correct installation procedure for the type of bulb you’re replacing.
What causes a head light to stop working?
Most headlight failures are caused by a blown a fuse. Other common problems include bad relay, switch, or module. Wiring problems, especially inside the headlight, can also cause a headlight to stop working.