on General

What would cause headlights not to work?

What would cause headlights not to work?

Most total headlight failures are caused by a bad component like a fuse, relay, or module. Wiring problems can also cause both headlights to stop working. The cause: A burned out bulb, or a problem with the high beam switch or relay. The fix: Replace the bulb, switch, or relay.

Where is headlight relay located?

Find the headlight relay closure: Usually, it is under the hood of the car. The point where your fuse panel is most likely located. On the other hand, it may also be located inside the cab of the car, this would be the case if your car comes with an interior fuse box.

How do I know if my 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.

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.

Why do my low beams not work but high beams do?

Time for New Headlights Since the low beams are used the most, they tend to burn our much sooner than the high beams. If your low beams stop working but the high beams still turn on, there’s a good chance that simply replacing the headlight bulbs with new OEM headlights will solve the problem.

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.

How do you fix a bad headlight relay?

Part 1 of 1: Replacing the headlight closure relay

  1. Materials Needed.
  2. Step 1: Locate the headlight closure relay.
  3. Step 2: Remove the fuse box cover or lid.
  4. Step 3: Remove the old relay.
  5. Step 4: Insert the new relay.
  6. Step 5: Test the headlights.
  7. Step 6: Reattach the fuse box cover.

Does each headlight have its own relay?

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.

Why do my low beams not work but my high beams do?

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.

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.

Why do I have high beams but no low beams?

Headlight Fuse or Relay 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.