Battery low beam

Can a high beam replace a low beam?

A high beam cannot substitute for a low beam. In the same manner, a low beam cannot substitute for a high beam. The headlights can fail in different ways. Sometimes, a headlight bulb can fail and still light. A good example is when one low-beam headlight not working. Auto manufacturers wire low-beam and high-beam headlights on different circuits.

Why is my left low beam not working?

Something is wrong if the right or left low beam is not working. It could be the multifunction switch, one of the headlight fuses, the headlight switch, the headlight relay, or the dimmer switch. The common and easiest fix among them is a blown fuse.

Can a low beam light stop working while high beam is working?

The low beam can stop working while the high beam is still working. If diagnosis proves dead bulbs are the root cause of the problem, the best solution would be to replace the bulbs with new ones. Check and replace defective relays. If the bulbs and the fuses are in good condition, narrow down the diagnosis to the headlight relays.

Why are my low beam headlights not working?

The relay transmits the required electric voltage to the headlights. The low beams have different relays from the high beams. So, if both low beam headlights stopped working but high beams works, you likely have a blown headlight relay. The best solution would be to replace the dead relay. How to fix both low-beam headlights stopped working?

Can a low beam and a high beam be wired together?

The low and high beams are wired on different circuits in most vehicles. This way, a low beam can stop working while the high beam is still working. Some manufacturers wire both low beams on the same circuits and the high beams on different circuits, while others use one fuse for each beam on each side of the headlights.

How do you know if a low beam headlight has a battery?

If you see a full battery voltage on the low beam terminal, power is getting to the low beam headlight. Leave the positive meter lead attached to that terminal and move the negative lead to the ground terminal in the connector. You should read the same voltage. If you don’t get full battery voltage, you have an open in the ground connection.