Why is my high beam work but not low beam?

Most total headlight failures are caused by a bad component like a fuse, relay, or module. High beam headlights don’t work or low beams don’t work. The cause: A burned out bulb, or a problem with the high beam switch or relay. The fix: Replace the bulb, switch, or relay.

What would cause low beam headlights not to work?

The likely cause is a fuse, headlight relay, headlight switch, dimmer switch or a wiring fault. About the only cause that is an easy fix is a blown fuse. Consult your owner’s manual to locate the main fuse for the headlight circuit and replace that fuse with one having the same amp rating.

Is there a fuse for low beam lights?

There may be a blown fuse or the wiring leading to your headlights may have been compromised. First, locate the headlight fuse and make sure it is intact. The filament in your low beam bulb may be about to break or there may be a voltage issue going to the headlight when you have the low beams on.

How do I know if my low beam relay is bad?

Replace the Relay Have an assistant turn on the headlights. If you hear the relay click, you know the coil is working, but you don’t know about the contacts. If you don’t hear the click, your relay is probably bad. The safest way to test a headlight relay is to replace it with a known good one.

How do you fix low beam headlights not working?

4 Steps to Fix a Low Beam Headlight Bulb

1. Find the blown out bulb.
2. Buy the replacement bulb.
3. Get your tools ready.
4. Disconnect the negative terminal on the battery.
5. Remove the trim pieces.
6. Find the headlight holder.
7. Disconnect the cables from the headlight.
8. Remove the headlight bulb from the bulb housing.

What would cause one headlight to not work?

A burned out bulb, or a problem with the high beam switch or relay can be the culprit here. If just one bulb fails to work in either high beam mode or low beam mode, it may be the bulb. Most headlight failures that are limited to just high or low beams are related to a relay or the high beam control switch.

Can AutoZone test a relay?

A relay can be checked with a jump cable, a voltimeter, an ohmimeter or a test light. If the terminals are accessible and the relay is not controlled by a computer, the fastest method will be a jump cable and a test light.

How do you fix one headlight not working?

You’ll need to replace the bulb, switch, or relay. If just one bulb fails to work in either high beam mode or low beam mode, it may be the bulb. Most headlight failures that are limited to just high or low beams are related to a relay or the high beam control switch.

What to do if headlights stop working?

Headlight Failure

1. First, try your dimmer switch. Often that will turn them back on again.
2. Try the headlight switch a few times. If that does not work, use your parking lights, hazard lights, or turn signals.
3. Pull off the road as soon as you can and leave your hazard lights on so that other cars can see you.