If your high beams are not working, it reduces your visibility on dark or rural roads and makes night driving more dangerous. The issue may be caused by burnt-out bulbs, a faulty dimmer switch, wiring problems, or a bad relay. An assessment is needed to identify the cause and restore safe lighting performance.

What does it mean if high beams are not working?

This usually means the high-beam circuit is not functioning correctly. It may be as simple as a blown bulb or fuse, or it could be due to a failed switch, relay, or wiring fault.

Common causes of high beams not working

• Burnt-out or failed headlight bulbs
• Blown fuse or faulty relay
• Faulty dimmer/multifunction switch
• Corroded or loose wiring and connectors
• Headlight control module failure (modern vehicles)

Why do you need to fix this problem quickly?

High beams are essential for spotting hazards on unlit roads. Without them, your visibility is significantly reduced, which increases the risk of accidents when driving at night or in poor weather.

How do you know when to get it checked?

You should book an inspection if:

• Your high beams don’t turn on at all
• Only one high beam works
• The high-beam indicator on the dashboard does not light up
• The headlights flicker when switching between low and high beam
• You recently replaced a bulb but the high beam still doesn’t work

What happens during an assessment?

A mechanic will:

1. Test the bulbs, fuses, and relays
2. Inspect the dimmer/multifunction switch
3. Check wiring and connectors for corrosion or damage
4. Test the headlight control module if fitted
5. Replace faulty components as required
6. Confirm both high beams work correctly after repair

How much does it cost to fix?

Replacing a bulb or fuse typically costs $50–$120. If the switch or relay needs replacing, costs may range from $150–$400. A faulty control module can cost $500–$1,200+ depending on the vehicle.

Is it unsafe to drive without working high beams?

Yes. Without high beams, your visibility is severely reduced on dark roads, making it unsafe to drive at night in unlit or rural areas. The issue should be fixed promptly to ensure safety and compliance with road laws.