Table of Contents
What can cause your headlights to not work?
4 Reasons Your Headlights May Not Be Working
- Burned-Out Bulbs.
- Damaged Relay.
- Wiring Problem.
- Blown Fuse. One of the first things you should do in the event of an electrical problem like nonfunctional headlights is to check the appropriate fuse.
Do you need to adjust headlights after replacing bulb?
No, you don’t have to re-aim the lights. The bulbs can be changed by taking the black plastic cover off, reaching inside the light housing and removing then reinstalling the bulbs.
Is there a fuse that controls the headlights?
All the electrical systems in your car, including the headlights, are protected with fuses. These are designed to ‘blow’ and break the circuit if too much power comes through them. This protects all the components on the circuit. If a headlight fuse blows, it could cause the headlights to stop working.
Why are my headlights still dim after replacing bulb?
Over time, your lenses can become oxidized—leading to a foggy, cloudy, or yellowed lens appearance. The opaque shade caused by oxidation does not let as much light pass through as clear lenses. This will leave your headlights looking dim, even if you have brand-new bulbs.
Why is one headlight dim and the other bright?
As headlight bulbs accumulate burn hours, the filament vaporizes and leaves a grey or brown metallic deposit on the inside of the headlight capsule. The deposit acts like a light filter and can dramatically reduce the light output from that bulb, causing the one headlight dimmer than the other issue.
How do you know if your headlight relay is bad?
Headlights Don’t Turn On The most common sign of a bad headlight relay is headlights that don’t work. A headlight relay will typically fail in the open position, preventing voltage from reaching the headlights. If the low beam relay fails, the low beams won’t work.