If your headlamps, beams, or brake lights are not working, it creates a serious safety risk by reducing your visibility and preventing other drivers from seeing your signals. The problem may be as simple as a blown bulb, or it could involve wiring, relays, or the vehicle’s lighting control module. An inspection will identify the cause and restore safe lighting function.

What does it mean if your lights are not working?

When multiple lights fail, it often points to an electrical issue such as blown fuses, faulty relays, wiring problems, or a control module fault. In some cases, only the bulbs themselves may be at fault, but widespread lighting failure usually indicates a larger issue.

Common causes of lights not working

• Burnt-out bulbs (headlights, high beams, or brake lights)
• Blown fuse or faulty relay
• Damaged or corroded wiring/connectors
• Faulty brake light switch
• Malfunctioning headlight or lighting control module
• Moisture or damage inside light housings

Why do you need to fix this problem quickly?

Driving with failed lights is unsafe and illegal. It reduces visibility, prevents other drivers from seeing you, and increases the risk of accidents. Your vehicle may also fail a WOF or safety inspection if lights are not working.

How do you know when to get it checked?

You should book an inspection if:

• Headlights, high beams, or brake lights do not work
• Lighting works intermittently or flickers
• The dashboard warning light for exterior lighting is illuminated
• Other electrical issues occur alongside light failure
• You notice moisture inside the light housings

What happens during an assessment?

A mechanic will:

1. Identify which lights are not working
2. Check bulbs, fuses, and relays for faults
3. Inspect wiring and connectors for corrosion or damage
4. Test the brake light switch and headlight switch
5. Check the lighting control module if applicable
6. Replace or repair faulty components and confirm proper light operation

How much does it cost to fix?

Simple bulb replacements typically cost $50–$120. Fuse, relay, or switch repairs may range from $150–$400. If the lighting control module needs replacement, repairs can cost $500–$1,200+ depending on the vehicle.

Is it unsafe to drive with lights not working?

Yes. Driving without functioning headlights or brake lights is extremely unsafe and illegal. Other drivers may not see you or your braking signals, greatly increasing accident risk. This issue should be repaired immediately.