What would cause both headlights to go out at the same time?

Can a blown fuse cause headlights to go out?

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.

How do I know if my headlight relay is bad?

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.

Is there a seperate fuse for each headlight?

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 can cause your headlights to not work?

4 Reasons Your Headlights May Not Be Working

  1. Burned-Out Bulbs.
  2. Damaged Relay. …
  3. Wiring Problem. …
  4. 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. …
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Why would both headlights suddenly go out?

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.

What do you do when both headlights go out?

If your headlights suddenly go out, do the following:

  1. First, try your dimmer switch. Often that will turn them back on again.
  2. Try the headlight switch a few times. …
  3. Pull off the road as soon as you can and leave your hazard lights on so that other cars can see you.

Where is the fuse for my headlights?

It is often located in the power center in the engine compartment, but may also be in the fuse panel under the dash. If the fuse has blown, replace it with a new fuse (same amp rating) and try again.

What fuse should I use for headlights?

For the high-beam fuses, in particular, I would start conservatively. Your average high beam (for a normal headlight) is 55 or 65 watts. In a 12 V circuit, that’s less than 6 amps nominally. If you put in a 10 amp fuse, you should be ok.