Vehicle HeadlightPractical lighting guidesObserve → record → next stepHeadlight
Check a symptom Headlight
Symptom Check
Turn a lighting problem into a clear, conservative action plan and a note for your repairer.
A clearer view of vehicle lightingUnderstand
Understand
the symptom.
Find the next
safe step.
Practical headlight guides and simple tools to help you observe, record and make a better next decision.
No account. No vehicle-data upload. No guesswork about fit.
Start with what you notice
Open the symptom check ↗What are your lights doing?
Dim or unequalCompare like with like ↗Not lighting upRecord what is out ↗FlickeringCapture the pattern ↗Moisture insideMist or pooled water? ↗Blown fuseStop repeated replacement ↗
Smoke, burning smell or heat damage? Stop using the affected system and get help. With smoke or fire, move away and call emergency services as needed. Do not continue driving with inadequate visibility.
Your browser is the workbench
Two free tools ↗Get the details in order.
Identify → document → confirmBulb Replacement
Build your checklist Bulb Replacement
Checklist
Keep your manual reference, part markings and questions together before you buy a replacement.
The field manualA better question.
Browse all eighteen guides ↗A better question.
A clearer answer.
Unequal headlight brightness
Separate an appearance difference from a light-source, lens, electrical or aiming problem.
Read the guide
Plastic vs. glass headlights
A clear distinction between the outside cover, the optics behind it, and the repair that actually fits the damage.
Read the guide
Halogen vs. LED
Compare replacement choices without treating an LED retrofit as a universal upgrade.
Read the guideThe next detail
Explore the full manual ↗After the first answer.
Low beam vs. high beam
A function-based guide to the controls, fog, other road users and recording a one-function fault.
Read the guide
Reading bulb markings
Separate the source category, electrical rating, brand and product label, then reconcile them with the vehicle documentation.
Read the guide
Restoration aftercare
Separate dry-to-touch, cure restrictions and routine cleaning so the finish is not treated as maintenance-free.
Read the guideStart with evidence.
We distinguish what you can observe from what needs measured diagnosis. Manufacturer documentation comes first.
Keep your record.
Print a workshop note or save a JSON file. Tool entries stay in your browser session until you export them.
Know the limit.
No invented fitment database, product rankings or workshop test claims. Read our editorial approach.